Soil GREENHORN LS. 33 32 x 31 30 29 28 27 x 26 25 24 23 22 21 GRANEROS SHALE 20 X 19 X 18 X DAKOTA FORMATION 17 16 15 14 13 12 11 10 x 9 8 7 6 5 4 3 2 1 EXPLANATION Limestone, chalk, and chalky limestone Skeletal limestone Marly chalk Shaly chalk Calcareous sandstone Sandstone Siltstone Silty shale Shale Calcareous shale Carbonaceous shale Lignite Pebbles of bone or clay Bentonite Gypsum Limestone concretion Septarian concretion Cone-in-cone concretion Clay ironstone concretion Phosphatic concretion Figure 8.- Graphic column of rocks exposed at Stop 1, East 1/2, NW sec. 6, T 15 S, R 10 W, Ellsworth County, Kansas. Section measured by Donald E. Hattin and assistants 1960, 1964. For description of this and subsequent graphic columns, see Appendix. 32