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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: AT88-4
| SHIP: | R/V Atlantic Twin |
| CRUISE: | AT-88 |
| CORE: | AT88-4 |
| LENGTH: | 644 cm |
| DATE OF CORE: | 9/88 |
| DESCRIBED BY: | N. Neff |
| LOCATION: | Southwest of Stratford Shoal, Long Island Sound |
| LATITUDE: | 41o 06.4' N |
| LONGITUDE: | 73o 09.2' W |
| LORAN: | 26679.5, 44004.3 |
| WATER DEPTH (m): | 12 |
| DATE SPLIT: | 3/89 |
| 0 - 24 cm - | Dark olive gray, 5 Y 5/2, soupy silt. Small, whole shells present from 0 - 5 cm. |
| 24 - 85 cm - | Void. |
| 83 - 218 cm - | Dark olive gray, 5Y 3/2, firm, sandy silt. Horizontal sand layers at 88 cm and 98 cm. Vertical sand layer at 150 cm (infilled burrow - ); shell fragments at 203 cm. Sharp, horizontal lower contact. |
| 218 - 480 cm - | Gray, 5Y 5/1, hard, medium to coarse sand. No structures. Gradational ( - ) lower contact coincident with end of cut section. |
| 480 - 510 cm - | Gray, 5Y 5/1, firm, gravelly sand; largest clast 1 cm. Gradational lower contact. |
| 510 - 650 cm | Olive gray, 5Y 6/2; firm, medium sand. Faint parallel laminations; dark: olive brown, light: light olive gray. Sharp, horizontal lower contact. 610 - 650 cm: several coarse sand layers lighter in color than medium sand matrix; section ends at 650 cm with a sand layer that acts as contact with next section. |
| 630 - 644 cm - | Dark grayish brown, 2.5 Y 4/2, hard, medium sand. No structures. |