W-20 Newcastle sections A- U.S. 85 roadcut thru Mowry & Newcastle beginning in Mowry. 5.9 Sandstone, fine-gr, hard, in thick massive beds, weathers yellow grey, to brown. 1.5 Siltstone with interbeds silty shale and local lenticular beds of fine grass. Siltst is laminated has thin ss beds loc., becomes silky downwzrd, lower 0.5 is chiefly grey silty shale silt lzmzna. 1.3 Shale, grey, silty, micaceous contain lzminze & thng beds silt. (Sample 1) 6.9 Bentonite +/or bentonitic sh, light green at top, grey green to blue green in lower 5', some blue grey, light. (Sample 2) 52