| Unit No. |
Description |
Thickness |
|
10
|
Limestone - basal 5 in. contains many Osagia algae and is medium crystalline and yellowish gray (5Y8/1) to grayish orange pink. It is overlain by yellowish gray(5Y8/1) fine crystalline, hard limestone that is seamed with irregularly bedded layers but the upper part weathers to the pitted vuggy irregular surface that is characterisic of the Capt. Cr. Limestone
|
8 ft.
|
|
9
|
Shale - thin, calcareous, variable inthickness
|
0.1 ft.
|
|
8
|
Limestone - ahs the appearance of a fine oolite, but theses may be osagia algae. They make up the entire rock for 1.5 ft. The base is very irregular and this bed varies in thickness from 1 to 2 ft. Has Clayey Osagia? zone at base locally
|
1.5 ft.
|
|
7
|
Shale - medium gray (N5) fossiliferous, contains many limestone nodules and concretions in upper foot, the upper 0.5 ft. constituting a clayey limestone
|
3 ft.
|
|
6
|
Limestone - very fine crystalline, hard, brittle, but apparently is very clayey, medium gray (N5)
|
100 ft.
|
|
5
|
Shale - olive gray (5Y4/1) contains many lenses and beds of ironstone concretions in basal portion, poorly exposed but general content remains the same until the upper 0.3 ft. which is medium gray (N5)
|
100 ft.
|
|
4
|
Limestone - very fossiliferous and oolitic. Oolites about 2 mm in diameter. Variable in color but generally brownish gray (5YR4/1) Oolites commonly filled with limonite locally. Many crinoid stems and high brachiopods(?) Upper 6 - 8 in. is full of Myalina? and fenestellate bryozoans and weathers more readily than does the lower massive part of the upper bed
|
3 ft.
|
|
3
|
Shale - fossiliferous, the fossils consisting of many crinoid fragments representing many different types of stems many Girtyocoelia bodies, and many irregular coral forms, color medium light gray (N6)
|
5.5 ft.
|
|
2
|
Limestone - quite variable in lithology and fossil content both vertically and laterally. The lower foot is light brownish gray, (5YR6/1) medium crystalline limestone that is studded with 1/2 in. brachiopods many of whos shells are now geodes (lined with small cystals). The next 0.4 ft. consists of a medium gray (N5) medium crystalline limestone which is either relatively unfossiliferous or consists almost completely of crinoid fragments. 3 ft. of brownish gray (5YR4/1) medium grained, very fossiliferous (many crinoid heads, stems and arms, and fenestellate bryozoans.) A mottled yellowish gray (5Y7/2) and grayish orange (10YR7/4) makes up the rest of the bed. It contains a zone of the same type of 1/2 in. brachiopods at the bottom but upward has many larger brachiopods with flat shells and ribs
|
5 ft.
|
|
1
|
Shale interval - very poorly exposed but apparently consists mainly of light olive gray (5Y%/2) shale with one or two 1 in. lenses of calcareous ironstone concretions about 4 ft. below top
|
23 ft.
|
