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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: AT88-1
| SHIP: | R/V Atlantic Twin |
| CRUISE: | AT-88 |
| CORE: | AT88-1 |
| LENGTH: | 464 cm |
| DATE OF CORE: | 9/88 |
| DESCRIBED BY: | N. Neff |
| LOCATION: | South of Stratford Pt., Long Island Sound |
| LATITUDE: | 41o 07.9' N |
| LONGITUDE: | 73o 05.6' W |
| LORAN: | 26654.8, 44011.3 |
| WATER DEPTH (m): | 12 |
| DATE SPLIT: | 5/89 |
| 0 - 88 cm - | Dark olive gray, 5Y 3/2, firm si Ug sand; scattered shell fragments and whole small shells; gradational lower contact. |
| 88 - 134 cm - | Yellowish brown, 10 YR 5/4, hard sand. Parallel laminations less than 1 cm thick throughout; dark: yellowish brown, light: very pale brown. Lower contact coincident with bottom of cut section. |
| 134 - 287 cm - | Brownish yellow, 10 YR 6/6, firm sand; fine sand at top of unit grading down-section to coarse sand with gravel (gravel: 262-287 cm). Parallel laminations from 147-262 cm; dark: yellowish brown, light: pale brown to brownish yellow. 144 cm: 5 cm clast in fine sand; 265 cm: 2.5 cm in gravelly sand Lower contact coincident with bottom of cut section. (Note: visual difference between section 88-134 cm and section 134-287 cm may be due to differences in water content, degree of compaction, and degree of disturbance not due to mineralogic and/or lithologic changes). |
| 287 - 424 cm - | Yellowish brown, 10 YR 5/8, hard sand. Fine (less than 1 cm), parallel laminations throughout; dark: dark yellowish brown, light: yellowish brown to pole brown. Sharp, horizontal lower contact. |
| 424 - 464 cm - | Dark brown, 10 YR 4/3, hard fine sand. 460-464 cm: small dome-like structure composed of coarse sand, gravel, and pebbles. Some gravel and pebble clasts appear angular. Reddish brown color to matrix sand at very bottom. |