Saline County Sec. 18, T. 15 S., R. 5 W

S of W Spring Creek and US-40 Measured By N.V. Plummer and J. Romary, Nov. 12, 1938
	Unit No. Description Thickness 21 Covered interval 1.5 ft. 20 Sandstone, thin-bedded, yellow to buff, fine-grained; 1" to 4" beds 4.1 ft. 19 Sandstone, massive, gray to buff, fine-grained, some yellow patches, containing a small amount of hematite 2.9 ft. 18 Sandstone, gray to yellow, clayey 1.75 ft. 17 Clay, gray to dark gray, plastic, some yellow stain at top 2.0 ft. 16 Clay, pure to plastic, gray; no stain 1.0 ft. 15 Sandstone and clay, alternating yellow and gray, respectively; mostly sandstone 3.5 ft. 14 Sandstone, resistant, massive, in beds up to 12" thick; thinner bedding in lower 1'; horizontally bedded 3.8 ft. 13 Sandstone, thin-bedded, clayey, yellow to gray; horizontally bedded 2.9 ft. 12 Clay, light gray, slight yellow stain 2.0 ft. 11 Clay, shaly dark gray to medium gray; some yellow sandy streaks; no gypsum 1.9 ft. 10 Clay, dark to medium gray, shaly, slight amount concretionary ironstone and yellow, thin sandstone 2.25 ft. 9 Ironstone (chert), concretionary 0.1-0.3 ft. 8 Clay, dark gray, shaly; contains gypsum and some concretionary limonite 2.1 ft. 7 Sandstone, yellow, clayey, 6"; soft white 2" 0.7 ft. 6 Clay, dark gray, slightly shaly; contains concretionary limonite, gypsum, sulfur, yellow material, and lignite 3.0 ft. 5 Shale, gray, with abundant concretionary yellow sandstone irregularly distributed; also gypsum; 2" concretionary layer at top; ellipsoidal, looks like hematite outside and chert inside 18.0 ft. 4 Shale, fissile, dark gray, contains gypsum in abundance and rusty yellow sandstone in small amounts; also some lignite 15.7 ft. 3 Sandstone, massive, yellow to brown; some evidence of horizontal bedding; rounded top, flat bottom 1.1-4.0 ft. 2 Silt to shale, gray to dark gray; contains concretionary layer 0-2.7 ft. 1 Silt to shale, gray to dark gray; contains concretionary layer 3.0 ft. 0 Shale, very plastic, gray; on concretionary layer 1.0 ft.
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