Chase County Sec. 20, T. 20 S., R. 8 E

Pasture ditch west of US 177 south of Cottonwood Falls Measured By H.G. O'Connor & J. Parks, 8/11 & 8/12/1947
	Unit No. Description Thickness 1 Chert covered slope 18.65 ft. 2 Shale - buff; blocky; clayey 13.4 ft. 3 Limestone - gray on upper 0.3 ft.; tan with fine brown mottleing in main ledge; partly crystalline; no fossils identifiable but some of crystalline materialappears to be fossil fragments, possibly forams or algae; weathers buff to gray 2.05 ft. 4 Shale - buff to green, clayey, blocky 1 ft. 5 Covered - (including unit 4) 2.75 ft. 6 Shale - blue-green, clayey; blocky 2 ft. 7 Covered - (including unit 6) 4.2 ft. 8 Shale - buff; thin-bedded; partly fossiliferous with ramose bryozoans, Composita, echinoid spines, Derbya 6.5 ft. 9 Shale - limy; mottled gray and buff; Derbya, crinoids in stringers 0.4 ft. 10 Shale - light gray to light tan; clayey with limy stringers; scattered Derbya 4.45 ft. 11 Limestone - gray to buff; hard, dense to impure, platy; finely silty; Composita, brachiopods, clams 1.65 ft. 12 Limestone - gray; massive; dense; silty; has crinoid, echinoid spines, brachs, clams?; weathers buff 0.4 ft. 13 Shale - buff to green; partly covered; clayey, finely blocky to thin-bedded 8.35 ft. 14 Covered - (including unit 13) 21.75 ft. 15 Limestone - gray with fine brown limonite stains; foraminiferal; partly crystalline, partly porous due to solution of some crystalline fossils; weathers with gray, rough honeycomb surface 1 ft. 16 Covered slope - blocks of limestone and chert floating down all the way to chert bed below 8.25 ft. 17 Chert - practically solid layer of irregular chert; gray; fossil fragments 1 ft. 18 Covered - (including unit 17) 2.85 ft. 19 Limestone - mottled gray; very silty; thin uneven bedded; shaly to limy; echinoid spines, Derbya, Composita, Dictyoclostus, crinoids; brachiopods are silicified; few quartz nodules scattered throughout 2.8 ft. 20 Shale - buff to olive; thin-bedded; few crinoids and fossil fragments 1.35 ft. 21 Siltstone - mottled gray; clams 1 ft. 22 Covered - (including unit 21) 4.85 ft. 23 Limestone - white; finely porous; massive; silicified fossil gragments; slotted brown spaces probably resulting from solution of fossils; chert nodules scattered throughout - (a) 0.2 ft. chert zone (b) 0.2 ft. chert zone (c) 0.2 ft. chert zone (d) 0.5 ft. chert zone (e) 0.4 ft. chert zone 11.9 ft. 24 Shale - buff to gray; limy; Derbya, Dictyoclostus, lacy bryozoans, other fossil fragments 0.7 ft. 25 Limestone - light gray to white; with nodular chert which weathers buff 3.65 ft. 26 Shale - olive to buff gray; thin-bedded with geodes of fine quartz and lens-like stringers 1.7 ft. 27 Shale - olive to buff gray; hard; medium-bedded; crinoids, Composita, Derbya; barchs are silicified 2.3 ft. 28 Shale - olive green; clayey; mudcracked; somewhat blocky with few quartz lenses 5.75 ft. 29 Shale - red; clayey; blocky; interbedded with little green blocky shale; distorted vertical jointing 6 ft. 30 Covered 3.8 ft. 31 Mudstone - light gray to blue-gray; platy; limy to shaly 2.05 ft.
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