|
Unit No. |
Description |
Thickness |
31
|
Limestone, nodular, cavernous (Morrill)
|
1.5 ft.
|
30
|
Shale
|
3 ft.
|
29
|
Boxwork (net of calcareous veins)
|
1 ft.
|
28
|
Shale
|
4.5 ft.
|
27
|
Shale, calcareous with fusulinids
|
0.5 ft.
|
|
Cottonwood Limestone (units 26-25)
|
|
26
|
Limestone, massive, with fusulinids and two zones of flint nodules
|
2.7 ft.
|
25
|
Limestone, massive, with 3 zones of flint nodules in the middle, and few scattered small flint nodules at the base. Few Lophophyllum?, crinoid joints.
|
2.8 ft.
|
24
|
Shale, calcareous, Pinna
|
0.5 ft.
|
23
|
Mudstone, banded, with small crinoid joints; upper half algal, worm trails in lower half
|
1 ft.
|
22
|
Shale, green
|
5 ft.
|
21
|
Mudstone, soft, nodular
|
0.4 ft.
|
20
|
Shale, green
|
1.2 ft.
|
19
|
Mudstone, greenish
|
0.9 ft.
|
18
|
Shale, green
|
2.5 ft.
|
17
|
Shale, purple
|
1.2 ft.
|
16
|
Shale, green
|
0.3 ft.
|
15
|
Shale, purple
|
2 ft.
|
14
|
Shale, green
|
3 ft.
|
13
|
Limestone, platy, banded; Pleurophorus
|
0.8 ft.
|
12
|
Shale, green; upper part with interstratified thin calcareous layers; base splittery, calcareous
|
9.2 ft.
|
11
|
Limestone, nodular
|
0.8 ft.
|
10
|
Shale, green, with vertical column-like calcareous (?) infiltrations; calcareous layers at the base
|
6 ft.
|
|
Neva Limestone (units 9-2)
|
|
9
|
Limestone, massive, tough
|
2 ft.
|
8
|
Shale
|
1 ft.
|
7
|
Limestone, massive, tough; numerous but poor fragmentary fossils
|
1 ft.
|
6
|
Limestone, massive, somewhat cavernous
|
5 ft.
|
5
|
Shale, calcareous, gray, fusulinids (sample) plentiful in lower part
|
3.1 ft.
|
4
|
Limestone, shaly, fossiliferous
|
0.4 ft.
|
3
|
Shale, calcareous with fusulinids (sample) plentiful at top; Composita, Marginifera scattered
|
1.5 ft.
|
2
|
Limestone, massive, fossils
|
1.3 ft.
|
1
|
Shale, gray, no fossils
|
3 +/- ft.
|
|