| Site |
Water Depth (m) |
Depth Interval (cm below seafloor) |
Sedimentologic Description |
Interpreted Depositional Environment |
| SP2006-02 |
1.8 |
0-157 |
0-8 cm; dark gray to
black silty fine to medium sand, worms, mottling |
Tidal channel |
| 8-64 cm; medium to
light gray medium sand, little to some coarse sand and gravel up to
3 cm at ~30-50 cm |
Tidal channel |
| 64-83 cm; dark gray
to black silty fine to medium sand |
Tidal channel |
| 83-125
cm; bright orange-brown silty fine sand; 3-cm diameter spongy root
or stem cutting diagonally from 83-115 cm |
Tidal channel |
| 94-97 cm; gray medium
sand layer |
Tidal channel |
| 125-143 cm; light brown
fine sand |
Tidal channel |
| 143-157; orange-brown
medium to coarse sand, some gravel up to 6 cm diameter |
Tidal channel |
| 157-384 |
Medium brown to orange-brown
clean fine to medium sand |
Glacial outwash |
| 250-270
cm and 320 cm; layered orange-brown stringers of medium to coarse
sand |
Glacial outwash |
| 384-459 |
Medium brown to orange-brown
medium to coarse sand, little to some gravel to 4 cm, less gravel
toward the bottom |
Glacial outwash |
| SP2006-03 |
8.2 |
0-77 |
Dark gray to black
silt and clay, trace to little fine sand below ~37 cm |
Deep flood tidal delta |
| 33
cm; 2-cm gravel |
Deep flood tidal delta |
| 50-70 cm, 3-cm moon
snail, sponges, 6-cm mytilid |
Deep flood tidal delta |
| 77-82 |
Dark gray silty fine
to coarse sand, abundant shells and fragments |
Deep flood tidal delta |
| 82-257 |
Dark blue-gray silt
and clay, trace fine sand, no shells except at 274 cm (Mya?), slight banding |
Deep estuary |
| 257 cm; 1-cm light
gray fine sand layer |
Storm/breach deposit |
| 257-372 |
Dark brown silt, trace
to little clay; black from 266-270 cm; rare 0.5-cm gravel |
Kettle pond |
| 355 cm; 1-cm medium
brown medium sand layer |
Storm deposit |
| 367-372 cm; dark brown
silt and clay |
Kettle pond |
| 372-448 |
Medium gray medium
to coarse sand and gravel, pebbles up to 5 cm fining down to medium
sand at 448 cm |
Ice contact stratified
glacial drift |
| 448-600 |
Medium yellow-brown,
medium sand, little to some coarse sand, trace gravel up to 2 cm |
Ice contact drift |
| 448-453 cm; orange
stain |
Ice contact drift |
| 480 cm; 1-cm orange stain |
Ice contact drift |
| 493 cm; 0.5-cm orange
stain |
Ice contact drift |
| 600-607 |
Coarse sand and gravel |
Ice contact drift |
| SP2006-04 |
3.6 |
0-215 |
Dark
blue-gray silt and clay, trace fine sand, trace shells, very soft,
trace fibers; no fibers below 70 cm |
Shallow estuary |
| 94 cm; 1 cm Mercenaria; crustacean? shell? |
Shallow estuary |
| 104 cm; 2-cm Mercenaria, slightly more sand
with depth |
Shallow estuary |
| 140-142 cm; 2-cm Mercenaria, stiffer below |
Shallow estuary |
| 193 cm; 2-cm articulated
Mercenaria |
Shallow estuary |
| 208 cm; 2-cm Mercenaria; no shells 208-394 cm |
Shallow estuary |
| 215-400 |
Faint 0.5-1-cm banding
below 215 cm, trace to little fine
sand, trace plant fragments (Spartina?), more brown in color |
Shallow estuary |
| 394 cm; Mercenaria or Mya shell |
Shallow estuary |
| SP2006-06 |
0.9 |
0-165 |
Dark blue-gray to black
silt and fine sand, some clay; trace clay below 20 cm; 3-cm mussels,
periwinkles, Ulva at the surface, trace shells
below; coarsening downward |
Shallow estuary/tidal
flat |
| 80-165 cm; medium gray-brown
silty fine sand |
Shallow estuary/tidal
flat |
| 147-155 cm; articulated
Mya |
Shallow estuary/tidal
flat |
| 165-341 |
Clean medium to light
gray medium sand, "salt and pepper" color |
Tidal channel |
| 170-176 cm; articulated
Mya |
Tidal channel |
| 205-207 cm; layer of
shell fragments up to 1 cm long, including mud snail |
Tidal channel |
| 318-320
cm; horizontal 2-cm thick by 6-cm long peat or bark "chip",
shell fragments |
Tidal channel |
| 341-475 |
Dense, dark blue-gray
silt and clay, trace to some fine sand, massive (no layers), trace
shell fragments and shells < 0.5 cm |
Shallow estuary |
| 440-448 cm; Mya, articulated, life position,
4-cm diameter burrow above from 432 cm to shell |
Shallow estuary |
U.S. Department of the Interior |
U.S. Geological Survey