Woods Hole Science Center
Sea Floor Image Maps Showing Topography, Sun-Illuminated Topography, Backscatter Intensity, Ruggedness, Slope, and the Distribution of Boulder Ridges and Bedrock Outcrops in the Stellwagen Bank National Marine Sanctuary Region off Boston, Massachusetts
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
List of Geographic Feature Names for the Stellwagen Bank National Marine Sanctuary Region | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DESCRIPTION: Feature type: An assemblage of 2 banks Size and shape: The Breakwater is a pair of linear, northwest-trending banks that are located on the same northwest azimuth and are; separated by a gap of approximately 0.2 nm (0.4 km). The combined length is approximately 4.5 nm (8.4 km), and the combined area is approximately 3.2 sq nm (11.4 sq km ) Depth (max. and min.): Tops of banks: 60-70 m; bases of banks: 85-95 m Steepness, etc : Maximum relief of banks ranges from 20 to 30 m ASSOCIATED FEATURES: The Breakwater lies in Stellwagen Basin west of Fifteen Bank, south of The Rockpile, and east of Compass Rose Bank. It is an assemblage of East Breakwater Bank and West Breakwater Bank. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000. REASON FOR CHOICE OF NAME: The Breakwater is a linear, northwest-trending pair of banks in Stellwagen Basin. Both banks are similarly aligned, and possibly were connected at one time. East Breakwater Bank and West Breakwater Bank collectively are called The Breakwater by local commercial fishermen. This usage has been confirmed in interviews with the fishermen, especially with Frank Mirarchi of Scituate, Massachusetts who has fished the region for over 20 years. As The Breakwater is actually 2 separate features, they have been given separate names here, and the name The Breakwater is proposed to refer to the group of 2 features (see separate descriptions for East Breakwater Bank and West Breakwater Bank). DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: COMPASS
ROSE BANK center point of feature
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: Compass Rose Bank is a sinuous, linear, northwest-trending feature that is approximately 3.4 nm (6.4 km) long and 0.6 to 0.8 nm (1.1 to 1.5 km) wide. Total area is approximately 2.25 sq nm (7.9 sq km). Depth (max. and min.): Top of feature 55 m; base 70-85 m. Steepness, etc : Maximum relief of feature is approximately 25 m on the southwestern flank ASSOCIATED FEATURES: Compass Rose Bank lies in Stellwagen Basin northwest of The Breakwater. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13267, Massachusetts Bay, 29th edition, scale 1:80,000. [feature indicated by sounding only] REASON FOR CHOICE OF NAME: Compass Rose Bank is a linear, northwest-trending feature in Stellwagen Basin. The bank is located within the compass rose printed on the nautical chart commonly used by commercial fishermen in this region (NOS Chart 13267). The name Compass Rose Bank traditionally is used by them to refer to this feature. This usage has been confirmed in interviews with the fishermen, especially with Frank Mirarchi of Scituate, Massachusetts who has fished the region for over 20 years. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates: center point of feature
linear feature
areal feature
DESCRIPTION: Feature type: Basin Size and shape: The Cove is a U-shaped feature that opens to the northwest. It is approximately 4.2 nm (7.9 km) long and 1.2-2.8 nm (2.2-5.2 km) wide. Total area is approximately 7.6 sq nm (26.5 sq km ). Depth (max. and min.): Basin depths range from 110 to 140 m. Steepness, etc : Maximum relief of the basin walls is approximately 80-85 m on the northeast-facing side. ASSOCIATED FEATURES: The Cove is bounded on the northeast and east by Jeffreys Ledge and on the southwest by Scantum Spur. The Cove is a subsidiary basin within Scantum Basin. CHART OR MAP REFERENCE: Name and feature shown on: National Ocean Service, National Oceanic and Atmospheric Administration, 1996, Chart 13009, Gulf of Maine and Georges Bank, 27th edition, scale 1:500,000. National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13278, Portsmouth to Cape Ann, 24th edition, scale 1:80,000. Feature shown but not named on: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000. REASON FOR CHOICE OF NAME: The Cove is a subsidiary basin within Scantum Basin. The name appears on several maps (NOS Charts 13009 and 13278), but the name until now has never been proposed and therefore does not appear in the Gazetteer of Undersea Features. The purpose of this report is to formalize the name The Cove which is in use today and which appears on published NOS charts. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Ocean or sea: Northwest Atlantic Ocean, Gulf of Maine region Coordinates: center point of feature
linear feature
areal feature
DESCRIPTION: Feature type: Basin Size and shape: Creed Basin is a relatively long, narrow, north northwest-trending feature. It is approximately 4.4 nm (8.2 km) long and varies from 0.5 to 1.0 nm (0.9 to 1.9 km) wide. Total area is approximately 3.2 sq nm (11.2 sq km ). Depth (max. and min.): Basin depths range from 125 to 165 m. Steepness, etc : Maximum relief of basin walls is approximately 60-65 m. Maximum local relief of the basin floor is approximately 20-25 m. ASSOCIATED FEATURES: Creed Basin is bounded on the east by Creed Ridge and on the west by Polygon Basin, Polygon Bank, and Gloucester Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Creed Basin extends along the western flank of Creed Ridge. Both features are named in honor of the Canadian Hydrographic Service vessel Frederick G. Creed that conducted the multibeam survey of the region in 1994-1996. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates: center point of feature
linear feature
areal feature
DESCRIPTION: Feature type: Ridge Size and shape: Creed Ridge is a north south-trending, somewhat sinuous feature with steep sides whose hilly surface is dissected by numerous small gullies. It is approximately 6.9 nm (12.9 km) long and 0.5-1.7 nm (0.9-3.2 km) wide. Total area is approximately 9.0 sq nm (31.5 sq km ). Depth (max. and min.): Top of feature 85-100 m; base 130-190 m. Steepness, etc : Maximum relief is approximately 105 m on the eastern flank; minimum relief is approximately 20 m on the northeastern flank where it is bounded on the north by Lower Jeffreys Ledge. ASSOCIATED FEATURES: Creed Ridge is bounded on the west by Creed Basin, on the north by Lower Jeffreys Ledge, on the east by West Tillies Basin, and on the south by Little Tillies Bank and Gloucester Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Creed Ridge is bounded on the west by Creed Basin. Both features are named in honor of the Canadian Hydrographic Service vessel Frederick G. Creed that conducted the multibeam survey of the region in 1994-1996. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: EAST BREAKWATER BANK LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: East Breakwater Bank is a linear, northwest-trending feature that is approximately 2.4 nm (4.5 km) long and 1.2 nm (2.2 km) wide. Total area is approximately 2 sq nm (7 sq km ). Depth (max. and min.): Top of feature 60 m; base 85-90 m. Steepness, etc : Maximum relief of feature is approximately 30 m on the southern flank. ASSOCIATED FEATURES: East Breakwater Bank lies in Stellwagen Basin, just to the southeast of West Breakwater Bank and west of Fifteen Bank. It is the eastern part of a pair of banks that collectively are called The Breakwater (see separate description). CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: East Breakwater Bank is a linear, northwest-trending bank in Stellwagen Basin. It is located 0.2 nm (0.4 km) southeast of West Breakwater Bank. Both features are similarly aligned, and possibly were connected at one time. East Breakwater Bank and West Breakwater Bank collectively are called The Breakwater by local commercial fishermen. This usage has been confirmed in interviews with the fishermen, especially with Frank Mirarchi of Scituate, Massachusetts who has fished the region for over 20 years. As The Breakwater is actually 2 separate features, they have been given separate names here, and the name The Breakwater refers to a group of 2 features. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Hill Size and shape: East Hill is a large feature with a pointed conical summit. It has more relief on its southern flank than on its northern flank. It is approximately 1.3 nm (2.4 km) long and 1.0 nm (1.9 km) wide. Total area is approximately 0.8 sq nm (2.8 sq km ). Depth (max. and min.): Top of feature is 50 m; base 80 m. Steepness, etc : Maximum relief of feature is approximately 75 m on the southern flank. ASSOCIATED FEATURES: East Hill is located east of Sanctuary Hill and is bounded on the northwest by Pigeon Basin and on the south by Sanctuary Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000. [feature not well defined] REASON FOR CHOICE OF NAME: East Hill is a prominent bedrock outcrop with a pointed conical summit that is deeply exhumed on its southern flank by glacial scouring. It lies just east of a similar, but more exposed feature named Sanctuary Hill. Interviews with local commercial fishermen failed to identify an appropriate local name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: EAST NINETY BANK LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: East Ninety Bank is a subrectangular feature with a relatively flat top that is approximately 1.6 nm (2.9 km) long and 1.0 nm (1.9 km) wide. Total area is approximately 1.5 sq nm (5.2 sq km ). It is separated by a shallow valley from North Ninety Bank to the west. Depth (max. and min.): Top of feature 90-95 m; base 100-180 m. Steepness, etc : Maximum relief of feature is approximately 85 m on the east flank. ASSOCIATED FEATURES: East Ninety Bank lies just east of North Ninety Bank and north of Middle Ninety Bank. It is part of an assemblage of 4 banks called Ninety Meter Banks (see separate description). CHART OR MAP REFERENCE: Feature shown but not named on: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. [feature not well defined] National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1996, Chart 13009, Gulf of Maine and Georges Bank, 27th edition, scale 1:500,000. [feature not well defined] National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13260, Bay of Fundy to Cape Cod, 36th edition, scale 1:378,838. [feature not well defined] REASON FOR CHOICE OF NAME: East Ninety Bank is the easternmost bank of an assemblage of 4 small, well-defined subrectangular banks (Ninety Meter Banks) that lie just to the east of Stellwagen Bank. They are separated from each other by valleys of varying depth, and thus their relief is variable. However, their unifying characteristic is the depth to their relatively flat top surfaces. The bank tops all lie at approximately 90 m water depth, a result of their common origin by glacial erosion. The word "meter" is part of the collective name (Ninety Meter Banks) of the 4 features, but it is not included in the names of the individual banks as it would make the name too long and cumbersome. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: EAST PIGEON HILL LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Hill Size and shape: East Pigeon Hill is a conical, northeast-trending feature. It is approximately 0.5 nm (0.9 km) long and 0.3-0.4 nm (0.6-0.7 km) wide. Total area is approximately 0.2 sq nm (0.7 sq km ). Depth (max. and min.): Top of feature is approximately 30 m; base is 50-55 m. Steepness, etc : Maximum relief of feature is approximately 25 m on the southeastern flank. ASSOCIATED FEATURES: East Pigeon Hill lies on the eastern part of Jeffreys Ledge, just east of West Pigeon Hill, and northwest of Pigeon Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000. National Ocean Service, National Oceanic and Atmospheric Administration, 1996, Chart 13009, Gulf of Maine and Georges Bank, 27th edition, scale 1:500,000. National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13278, Portsmouth to Cape Ann, 24th edition, scale 1:80,000. REASON FOR CHOICE OF NAME: East Pigeon Hill is a small but prominent bedrock outcrop that protrudes from the relatively flat sandy surface of Jeffreys Ledge. The hill has been the site of intensive biological research, and it was named unofficially as Pigeon Hill by Richard A. Cooper (Marine Sciences and Technology Center, University of Connecticut) in a NOAA publication (Hulbert and others, 1982, Ecosystem definition and community structure of the macrobenthos of the NEMP monitoring station at Pigeon Hill in the Gulf of Maine: NOAA Technical Memorandum NMFS-F/NEC-14). The name is used by scientists to this day. However, because the name Pigeon Hill now is used for 7 features in Massachusetts (some nearby in Essex County), the new feature is named East Pigeon Hill to distinguish it from an adjacent twin feature that is named West Pigeon Hill elsewhere in this report. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: EAST TILLIES BASIN LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Basin Size and shape: East Tillies Basin is an elongate, narrow northsouth-trending feature that varies little in width. It is approximately 8.3 nm (15.6 km) long and 0.3-0.7 nm (0.6-1.3 km) wide. Total area is approximately 4.0 sq nm (14.0 sq km ). Depth (max. and min.): Basin depths range from 110 to 150 m. Steepness, etc : Maximum relief of basin walls is approximately 50-80 m on the eastern and western sides. Maximum local relief of the basin floor is approximately 30 m in the northern part. ASSOCIATED FEATURES: East Tillies Basin is bounded on the north by North Tillies Basin and on the west by Tillies Bank. CHART OR MAP REFERENCE: Feature shown but not named on: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. [feature not well defined] National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13278, Portsmouth to Cape Ann, 24th edition, scale 1:80,000. [northern part of feature only] REASON FOR CHOICE OF NAME: Background on the name "Tillies." Tillies
Bank is a very prominent feature that is well known by commercial fishermen
and marine scientists who work in the region. The name appears on several maps
(NOS Chart 13009; NOS Bathymetric Fishing Map, Gloucester sheet), but the name
has never been proposed and therefore does not appear in the Gazetteer of Undersea
Features. See formalization of the name Tillies Bank in this report. Summary of the use of the name "Tillies" in this and accompanying documents: Formalize the name Tillies Bank.
DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: Ellipse Bank is a relatively flat, northwest-trending feature. The bank surface is elliptical in outline. It is approximately 2 nm (3.7 km) long and 1.2 nm (2.2 km) wide. Total area is approximately 1.8 sq nm (6.1 sq km ). Depth (max. and min.): Top of feature 60-65 m; base 85-120 m. Steepness, etc : Maximum relief of feature is approximately 55 m on the eastern flank. ASSOCIATED FEATURES: Ellipse Bank lies northeast of Lower Stellwagen Bank and is bounded on the east by Stenos Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Ellipse Bank is a northwest-trending bank with a distinctively elliptical surface outline. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: Fifteen Bank is a small, linear, northwest-trending bank that is approximately 1.0 nm (1.9 km) long and 0.2 nm (0.4 km) wide. Total area is approximately 0.4 sq nm (1.4 sq km ). Depth (max. and min.): Top of feature 70 m; base 85-105 m. Steepness, etc : Maximum relief of feature is approximately 35 m along the northern flank. ASSOCIATED FEATURES: Fifteen Bank lies in Stellwagen Basin, west of and adjacent to Western Spur. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Fifteen Bank is a small, linear, northwest-trending feature that lies near the intersection of Loran-C coordinates 9960-W-13815 and 9960-Y-44215. The local commercial fishermen continue to navigate by Loran-C when they tow their gear, and they refer to this feature in various ways using the term "Fifteen". This usage has been confirmed in interviews with the fishermen, especially with Frank Mirarchi of Scituate, Massachusetts who has fished the region for over 20 years. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Basin Size and shape: First Basin is an elongate, eastwest-trending feature that narrows to the east. It is approximately 4.9 nm (9.2 km) long and 0.7-2.0 nm (1.3-3.7 km) wide, and its minimum dimension is approximately 3.0 nm (5.6 km). Total area is approximately 6.0 sq nm (21.0 sq km ). Depth (max. and min.): Basin depths range from 90 to 145 m. Steepness, etc : Maximum relief of the basin walls is approximately 60-65 m on the northern side. Maximum local relief of the basin floor is approximately 20 m. ASSOCIATED FEATURES: First Basin is bounded on the north by Jeffreys Ledge and on the south by North Tillies Basin and Lower Jeffreys Ledge. CHART OR MAP REFERENCE: Feature shown but not named on: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13278, Portsmouth to Cape Ann, 24th edition, scale 1:80,000. REASON FOR CHOICE OF NAME: First Basin is an elongate, east-west-trending basin located south of Jeffreys Ledge, a major fishing ground. Gloucester fishermen working on Jeffreys Ledge traditionally refer to this basin as First Basin, as it is the first deep area they encounter on the southeastern flank of Jeffreys Ledge when sailing from Gloucester. This usage has been confirmed in interviews with the fishermen, including Andrew Giacalone, Sam Novello, Russel Sherman, and Richard Taylor of Gloucester, Massachusetts. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 per cent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: Gloucester Bank is a subrectangular, chiefly eastwest-trending feature with a very uneven surface. It is approximately 4.5 nm (8.4 km) long and 2.4 nm (4.5 km) wide. Total area is approximately 9.5 sq nm (33.2 sq km ). Depth (max. and min.): Top of feature 45-55 m; base 60-80 m. Steepness, etc : Maximum relief of feature is approximately 20 m on the eastern flank. ASSOCIATED FEATURES: Gloucester Bank is bounded on the east by the western part of Gloucester Basin. CHART OR MAP REFERENCE: Feature shown but not named on: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. [feature not well defined] National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Gloucester Bank is located 4 nm (7.5 km) southeast of the entrance to Gloucester Harbor, Massachusetts. It is bounded by Gloucester Basin on the east. Gloucester is the major fishing port in the region. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: GLOUCESTER BASIN LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Basin Size and shape: Gloucester Basin is an elongate, northwest-trending feature. It is approximately 11.5 nm (21.6 km) long and from 1.0 to 2.5 nm (1.9 to 4.7 km) wide. Total area is approximately 21.0 sq nm (73.5 sq km ). Depth (max. and min.): Basin depths range from 80 to 180 m. Steepness, etc : Maximum relief of basin walls is approximately 60-70 m on the northeastern side. Maximum local relief of the basin floor is approximately 20-30 m. ASSOCIATED FEATURES: Gloucester Basin is bounded on the northeast by Thacher Bank, Polygon Basin, Polygon Bank, Creed Basin, Creed Ridge, and Little Tillies Bank, on the southwest by Ellipse Bank and Stenos Basin, and on the west by Gloucester Bank. CHART OR MAP REFERENCE: Uchupi, Elazar, 1975, Map showing relation of land and submarine topography, Nova Scotia to New Jersey: U.S. Geological Survey Miscellaneous Geologic Investigations, Map I-451, sheet 3, scale 1:100,000. [feature not well defined] National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1998, Chart 13278, Portsmouth to Cape Ann, 24th edition, scale 1:80,000. [feature not well defined] REASON FOR CHOICE OF NAME: Gloucester Basin is a relatively large northwest-trending basin that lies approximately 8 nm (15 km) east of the entrance of Gloucester Harbor, Massachusetts. It is bounded on the west by Gloucester Bank. Gloucester is the major fishing port in the region. Interviews with local commercial fishermen failed to identify an appropriate name for this feature. DISCOVERY FACTS: The Stellwagen Bank National Marine Sanctuary region was surveyed on four cruises from the fall of 1994 to the fall of 1996. The survey was a collaborative effort of the U.S. Geological Survey and the National Oceanic and Atmospheric Administration with support from the University of New Brunswick Ocean Mapping Group and the Canadian Hydrographic Service. The survey ship was the Frederick G. Creed, a SWATH (small waterplane twin hull) vessel 65 feet in length and fitted with a hull-mounted Kongsberg Simrad EM 1000 multibeam echosounder. Resolution of the multibeam mapping system is 10 meters horizontally and 20 centimeters vertically. Navigation was by Differential GPS with a horizontal accuracy of 10 m or better. An area of approximately 1100 square nautical miles was mapped. The corner points of the rectangular survey area are: Northeast corner: 42o 48'N, 70o 02'W Southwest corner: 42o 05'N, 70o 36'W Date: 1994-1996 Discoverer (individual, ship): Page Valentine and the USGS and CHS mapping teams onboard the Canadian Hydrographic Service vessel Frederick G. Creed. Equipment or instruments used: Kongsberg Simrad EM1000 multibeam echosounder Navigation used: Differential GPS Horizontal accuracy: 10 meters or better Spacing of tracks, crossings, etc: The multibeam survey covered 100 percent of the sea bottom in the area surveyed (coordinates listed above). SUPPORTING MATERIAL: Publications where the new geographic names will appear for the first time: Valentine, Page C., Baker, Jessica L., and Unger, Tanya, S., 2003, Sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-A, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-B, scale 1:60,000, 1 sheet. Valentine, Page C., Unger, Tanya, S., and Baker, Jessica L., 2003, Sun-illuminated sea floor topography and backscatter intensity of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts: U.S. Geological Survey Geologic Investigations Series, Map I-2676-C, scale 1:60,000, 1 sheet. SUBMITTED BY: Page C. Valentine FEATURE NAME: LITTLE TILLIES BANK LOCATION: Coordinates:
linear feature
areal feature
DESCRIPTION: Feature type: Bank Size and shape: Little Tillies Bank is a sinuous, northsouth-trending feature with a relatively flat surface. It is approximately 2.8 nm (5.2 km) long and 0.4-1.0 nm (0.7-1.9 km) wide. Total area is approximately 1.7 sq nm (5.9 sq km ). Depth (max. and min.): Top of feature is 70-75 m; base is 100-185 m.. Steepness, etc : Maximum relief of feature is approximately 95 m on the northeastern flank. ASSOCIATED FEATURES: Little Tillies Bank is bounded on the northwest by Creed Ridge, on the southwest by the southeastern part of Gloucester Basin, and on the east by West Tillies Basin. CHART OR MAP REFERENCE: Feature shown but not named on: National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Gloucester sheet, scale 1:100,000 National Ocean Service, National Oceanic and Atmospheric Administration, 1986, Bathymetric Fishing Map, Provincetown sheet, scale 1:100,000 REASON FOR CHOICE OF NAME: Background on the name "Tillies." Tillies Bank is a very prominent feature that is well known by | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
