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Marshall County

Sec. 16, T. 5 S., R. 8 E
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NE 1/4 SE 1/4 sec 16, at the spring
Measured By M.K. Elias, 1932
Remarks II-3
Unit No. Description Thickness
  Stearns shale formation  
27 Limestone, flaggy 2 ft.
26 Shale, gray 5 ft.
25 Limestone 0.5 ft.
24 Mudstone, splittery 1.5 ft.
23 Shale, calcareous, splittery 1 ft.
22 Shale, green 2 ft.
21 Shale, dark-green 1 ft.
20 Shale, purple 2.5 ft.
19 Shale, dark-green 0.7 ft.
18 Shale, purple 0.8 ft.
17 Shale, dark-green 0.3 ft.
16 Mudstone, cavernous, light-gray with green 1 ft.
15 Shale, calcareous 0.7 ft.
14 Limestone, banded, with poorly-preserved pelecypods 1 ft.
13 Mudstone, splittery 1 ft.
12 Shale, dark-gray, splittery, calcareous below 2 ft.
  Beattie limestone formation  
  Morrill limestone member  
11 Limestone 1 ft.
10 Shale, calcareous 1 ft.
9 Limestone 1.5 ft.
  Florena shale member  
8 Shale, calcareous 2.5 ft.
  Cottonwood limestone member  
7 Limestone, massive, full of fusulinids 2 ft.
6 Limestone, massive, with very numerous fragmentary fossils; echinoid spines 4 ft.
  Eskridge shale formation  
5 Mudstone, splittery 1 ft.
4 Shale, green 4 ft.
3 Shale, green, calcareous 1 ft.
2 Mudstone, green, with Aviculopecten and Juresania 1 ft.
1 Shale, green 3 ft.
0 Shale, red 1+ ft.

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