EASTERN BLACK HILLS SECTIONS Bear Butte section. Part A. Measuring up from the contorted siltstone in the Lkota. Top of contorted siltst. [20]^ 4) 31+6 Partially wash covered. Upper 6 to 7 ft is siltstn, becoming clayey at base, light gray with rootlets in upper 0.6, and local heavy yellow ochrous Fe, impreg. Most of upper 6-7 ft is spherulitic. Below is silty variegated claystone, gray to light greenish gray mottled with red some yellow in upper 1/2 and purplish gray in lower 1/2, basal 2.0 is grey light clayey silt grading to sandy siltst. below it. 3) 9.2 Siltstone, gray, weathers gray-white, massive, interbedded with dark gray to black silty shale. 2.3 Siltst, massive, becoming clayey+sandy top. 1.2 Siltst, shaly, gray, pings sh, plant frags upper half grades to siltst, loc. 2.0 Siltst, massive, light gray 0.5 Shale, gray, peppery, plant frags. 3.0 Partially covered - chiefly massive rootlets light gray silt, plant frags (sample 1) 0.2 Siltst., shly, carb, dk gr- black. 2 2) 1.2 Sandstone, thinly interbedded with sandy siltstone, friable. 6