Marshall County Sec. 20, T. 4 S., R. 9 E

Quarry west of north-south road east of center sec 20 Measured By M.K. Elias, 1932 Remarks I-10
	Unit No. Description Thickness   Neva limestone member   14 Limestone, light-gray, tough, fossiliferous 1 ft. -- Shale, gray 3 ft. 13 Mudstone, greenish-gray 1 ft. 12 Shale, gray 4 ft. 11 Limestone, flaggy, cavernous, light-gray with microfauna 1 ft. 10 Limestone, light-gray 1 ft. 9 Shale 0.2 ft. 8 Limestone, light-gray 1 ft. 7 Shale, gray to black and fissile at base 2 ft. 6 Mudstone, dark-gray with fauna in the upper part: Juresania, Myalina, Aviculopecten, Spirifer, crinoid joints, Stiliola-like cylindrical shells 1 ft. 5 Shale, calcareous 0.5 ft. 4 Mudstone to limestone, with small crinoid joints in the upper part 1.5 ft. 3 Shale, calcareous, splittery 0.5 ft. 2 Mudstone to limestone 0.8 ft. 1 Shale, calcareous in lower part 2+ ft.
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