|
| Unit No. |
Description |
Thickness |
|
1
|
Limestone - yellowish gray (5Y8/1) and yellowish orange (10YR7/6) on weathered surface, and broken surface also. Very fossiliferous, consisting of crinoid stems, sponges (Amblysiphonella and Girtyocoelia), fenestrate bryozoans, locally almost entirely small brachiopods and a few large brachiopods
|
7 ft.
|
|
2
|
Shale - light olive gray (5Y5/2). Calcareous, fossiliferous, from which many sponges and crinoid stems weather. Poorly exposed
|
6.5 ft.
|
|
3
|
Limestone - very fine crystalline, light gray (N7) fresh, grayish orange (10YR7/4) weathered. Very fossiliferous, algal, brachiopod fragments, crinoid stems, sponges.
|
0.5 ft.
|
|
4
|
Shale - silty, yellowish gray (5Y7/2) that contains a thin 1/4 - 1/2 in. bed of ironstone concretions. Grayish yellow (5Y8/4) and pale yellowish orange (10YR8/6) below the top, and a 2 in. limestone bed 5.2 ft. below the top. The limestone bed is very fossiliferous, clayey, with crinoid stems, several spines of brachiopods, graywish orange (10YR7/4). A silty layer 1 in. separates the upper yellowish gray shale from an olive gray (5Y4/1) very slightly silty shale. The siltstone layer contains plant fragments. Another siltstone layer 1 in. thick occurs 2.5 ft. below the upper one. The shale between the two varies laterally in color between the yellowish gray and olive gray color. Covered to bottom of hill where Iola is in stream bed.
|
40 ft.
|
|
