|
Unit No. |
Description |
Thickness |
1
|
Clay ironstone layer. Contains Marginifera and Ambocoelia. Weathers to shelly limonite
|
3 - 4 in.
|
2
|
Shale, dark gray to black. Weathers light gray.
|
2 ft.
|
3
|
Limestone, hard, medium gray, weathers to brown and hematite red. Varies in thickness laterally. Upper 3 inches is Marginifera coquina. Crinoid stems only other abundant fossil. Formed into large blocks by jointing
|
3 ft.
|
4
|
Clay and shale
|
1 ft.
|
5
|
Shale, gray.
|
7 ft.
|
6
|
Shale, black, platy. Contains large isolated rounded septarian clay ironstone concretions
|
2 - 4 ft.
|
7
|
Water
|
|
|