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Unit No. |
Description |
Thickness |
1
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Shale, dark gray to black, weathers lighter. Has many limestone and shale concretions of small dimensions. Lower part very fossiliferous. Mostly pelecypods and gastropods. Upper part very limey and hard
|
3.5 ft.
|
2
|
Shale, black, fissile, very well jointed, has abundant small rounded phosphatic concretions. Joint planes weathered rust brown
|
6.66 ft.
|
3
|
Limestone, very earthy, with numerous large black concretions of a more pure limestone. Concretions are hard and contain a few large cephalopods, which do not come free from the surrounding matrix. Earthy limestone is hard, and thinly laminated
|
1.66 ft.
|
4
|
Shale, dark, very fossiliferous. Calcareous, contains numerous large Marginifera?
|
+/- 1 ft.
|
5
|
Limestone, hard, very fossiliferous, predominantly large species of Composita, which, together with other large types, forms laminae which at first appear to be calcite veining. Thick (1 inch) bedding
|
+/- 6 ft.
|
6
|
Clay, irregular thickness, gerruginous, apparently residual
|
+/- 1 ft.
|
7
|
Chert residue, much seemingly very little displaced. Black to dark brown in color. Very straight break. Some unidentifyable fossil material
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+/- 1 ft.
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