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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: AT88-6

SHIP: R/V Atlantic Twin
CRUISE: AT-88
CORE: AT88-6
LENGTH: 618 cm
DATE OF CORE: 9/88
DESCRIBED BY: N. Neff
LOCATION: South of Niantic Bay, Long Island Sound
LATITUDE: 41o 16.2' N
LONGITUDE: 72o 12.2' W
LORAN: 26205.1, 43987.9
WATER DEPTH (m): 51
DATE SPLIT: 3/89
0 - 430 cm - Dark gray, 5Y 4/1, firm, sandy (very fine) silt, with organic material 0 - 30 cm: numerous olive to brownish gray sand patches and some shell fragments 103 cm: round sand patch. 110 cm: 5 cm diameter, round wood fragment. 162 cm: sand patch. 90 - 290 cm: horizontal couplets of alternating very fine sand and silt; each layer approx. 0.5 cm thick. Layers of organic material/wood/plant fragments at 125 - 140 cm, 150 cm, 243 cm, and 287 cm. Gradational lower contact (color change only).
430 - 618 cm - Weak red, 2.5 YR 4/2, firm, sandy (very fine) silt with organic material and occasional pebbles. Grain size increases down - section to coarse sand, few pebbles and lesser amounts of silt. 550 - 618 cm: sand occurs in layers, 2 - 5 cm thick, dusky red to gray - red in color.


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