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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: AT88-13

SHIP: R/V Atlantic Twin
CRUISE: AT-88
CORE: AT88-13
LENGTH: 514 cm
DATE OF CORE: 9/88
DESCRIBED BY: N. Neff
LOCATION: Southeast of Narragansett Bay, R.I., Rhode Island Sound
LATITUDE: 41o 17.9' N
LONGITUDE: 71o 15.0' W
LORAN: 14394.8, 43911.5
WATER DEPTH (m): 37
DATE SPLIT: 3/89
0 - 35 cm -  Light brownish gray, 2.5Y 6/2, loose, fine to coarse sand. Few shell fragments and few 1 - 3 cm clasts. Unit disturbed in splitting. Gradational lower contact.
35 - 303 cm -  Grayish brown, 2.5Y 5/2, firm, fine to coarse sand. 60 and 75 cm: horizontal, dark grayish brown laminae of organic material less than 1 cm thick. 100 - 165 cm irregular, inclined, continuous to discontinuous gray silty layers. 150 - 303 cm: few scattered gravel clasts, 0.5 - 1.0 cm in size. Sharp horizontal lower contact.
303 - 514 cm - Dark gray, 5Y 4/1, firm silt and clay, some mottling due to organic matter.


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