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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
CERC Technical Report 81-3
Table 3.
| Designation | Core No. | Water Depths (m) | Thickness (m) | Mean grain size (mm) | Est. Volume (Million m3) | REMARKS |
| A | 31 | 11 to 14 | 2.7 | 0.25 to 0.27 | 1 | Deposit consists of two irregular ridges off Matinicock Point |
| B | 36 | 8 to 18 | 4.3 | 0.60 to 0.90 | 6 | Shoal about 6.4 km S. of Stamford is glacial till on a bedrock high |
| C | 7A | 7 to 18 | 3.1 | 0.50 to 0.90 | 4 | Cable and Anchor Reef S. of Norwalk Islands is glaciofluvial sediment on a bedrock high |
| D | 26, 26B, 38 | 6 to 18 | 2.7 | 0.50 to 1.20 | 7 | Shoal off Eatons Neck is composed of Pleistocene sands |
| E | 9 | 12 to 20 | 3.9 | 0.34 to 1.10 | 4 | Shoal about 5km SE. of Norwalk Islands consists of steeply dipping forset strata |
| F | 12 to 15, 49, 53A, 54 | 6 to 12 | 3.9 | 0.28 to 0.62 | 37 | Shoal off Bridgeport is a glaciofluvial delta with steeply dipping forset strata |
| G | 21 | 6 to 15 | 3.3 | 0.25 to 1.00 | 5 | Shoal off Crane Neck is composed of Pleistocene sands |
| H | 78 | 6 to 15 | 2.7 | 0.61 to 0.89 | 5 | Deposit consists of glaciofluvial sands |
| I | 57 | 8 to 9 | 3.7 | 0.31 to 1.10 | 10 | Shoal S. of Milford overlies the buried ancestral Quinnipiac River channel |
| J | 76 | 6 to 17 | 3.5 | 0.47 to 0.99 | 7 | Shoal is well stratified with forset strata |
| K | 58A | 6 to 9 | 2.1 | 0.43 to 0.48 | 3 | Townshend Ledge is composed of glaciofluvial sediment on a bedrock high |
| L | 75 | 6 to 18 | 3.8 | -----------1 | 40 | Shoal has forset strata prograding west |
| M | 72, 74 | 6 to 17 | 2.7 | 0.34 to 0.79 | 54 | Shoal consists of Pleistocene glaciofluvial sands; sand waves with 5-m relief are present |
| N | 64 to 67A | 2 to 6 | 2.7 | 0.43 to 0.84 | 6 | Long Sand Shoal is composed of stratified glaciofluvial and estuarine sands overlying bedrock |
1 Data Unknown