Unit No. |
Description |
Thickness |
7
|
Hertha limestone; as elsewhere in area
|
|
6
|
Black shale - some concretions
|
29 ft.
|
5
|
Giant concretions in a definate zone
|
+/- 2 ft.
|
4
|
Shale; gray mostly; only slightly carbonaceous
|
2 ft.
|
3
|
Shale - gray - slightly carbonaceous
|
5.4 ft.
|
2
|
Limestone; dense; earthy; brown to black; squamuiaria; spirifer; Rhombopora; Productids
|
1.6 ft.
|
1
|
Shale; gray
|
+/- 1 ft.
|