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U.S. Geological Survey Open-File Report 02-002

Geological Framework Data from Long Island Sound, 1981-1990:

A Digital Data Release

Visual Core Description: AT88-14

SHIP: R/V Atlantic Twin
CRUISE: AT-88
CORE: AT88-14
LENGTH: 379 cm
DATE OF CORE: 9/88
DESCRIBED BY: N. Neff
LOCATION: Southeast of Narragansett Bay, R.I., Rhode Island Sound
LATITUDE: 41o 21.0' N
LONGITUDE: 71o 12.6' W
LORAN: 14369.8, 43928.7
WATER DEPTH (m): 31
DATE SPLIT: 3/89
0 - 47 cm -  Yellowish brown, 10YR 5/6, firm, medium sand grading down - section to sandy gravel. Large 7 - cm subrounded clast at 35 cm; shell fragments. Sharp horizontal lower contact.
47 - 260 cm -  Light yellowish brown, 10YR 6/4, hard sand with a few scattered gravel clasts. 143 - 240 cm: irregular (not evenly - spaced) convex up laminations; dark: yellowish red; light: light yellowish brown; dark laminae are less than 1 cm to 2 cm thick. Gradational lower contact.
260 - 360 cm -  Light yellowish brown, 2.5Y 6/4, hard, medium to fine sand. Faint, parallel, very thin laminae of dark gray to black material (organic matter/) throughout. 296 cm: dark brown, discontinuous organic ( - ) Layer. 315 - 332 cm: laminated zone of different color; matrix sand: 10 YR 5/8, yellowisg brown. Gradational lower contact.
360 - 379 cm - Gray, 5Y 5/1, hard fine sand. Wavy, irregular, slightly inclined laminations of alternating fine sand and silt.


Department of the Interior > U.S. Geological Survey > Coastal and Marine Geology Program  > Long Island Sound Studies
Contact: L.J. Poppe (lpoppe@usgs.gov")