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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: LISAT-9
| SHIP: | R/V Atlantic Twin |
| CRUISE: | AT-84 |
| CORE: | LISAT-9 |
| LENGTH RECOVERED: | 686 cm |
| PENETRATION: | 29' |
| NUMBER OF SECTIONS: | 5 |
| LOCATION: | central Long Island Sound |
| LATITUDE: | 41o 10.43' N |
| LONGITUDE: | 72o 53.15' W |
| LORAN: | 26549.9, 44010.4 |
| COMMENTS: | Seismic line for this core is Line AT#8 (sparker). This lines runs from 1552-1600. hrs. Core at 1558 on record. Core into beach? (site II-3 on uniboom record line 5, at 1104, AST 83-2). Section 4 contains contact between clay and sand; section 5 contains color change about 6 inches into the top. |
| PENTROMETER RECORD: | Very rapid 0-15'; rapid 16-25', moderate 26,27,28'; slow to end |
| 0-138 cm (Section 1) - | Dark olive gray, 5Y 3/2, silty clay with some shell fragments, more shells above 7 cm. Silt appears homogeneous except for a mica lens at 126-127 cm, (25-34 cm: 5% sand, 79% silt, 16% clay). |
| 138-290 cm (Section 2) - | 138-140 void. 140-290 cm: dark olive gray, 5Y 3/2 silty clay to clay, some zones of shells and shell hash. |
| 290-443 cm (Section 3) - | Dark olive gray, 5Y 3/2 clayey silt with occasional fine sand, slightly coarser than overlying sections, within the clayey silt are areas that are predominantly silt and sand (burrows?), some fragments of shell, (328-336 cm: 16% sand, 66% silt, 18% clay). |
| 443-496 cm (Section 4) - | 445-571 cm: dark olive gray, 5Y3/2, silty clay with some fine sand and shell hash, sandy zones are probably burrows. Contact at 571 cm is sharp in color and texture. 571-596 cm: dark brown 10YR 3/3 fine sand with silt and medium sand, no shells; no clay; homogeneous. |
| 596-686 cm (Section 5) - | Dark brown, 10YR 3/3, sand, moderately well sorted, void at 659-663 cm, no sign of organic material; no changes in texture (625-633 cm |