-157- Section 10 Contd. Thicknes (feet) 10. Siltstone, very sandy, and shale, light green-brown weathering; some orange, very fine, quartz sandstone . . . . . . . . 41 9. Sandstone, medium to light brown, medium to fine quartz sand, some chert pebbles . . . . 3/4 8. Siltstone, like unit 4 . . . . . . . . . . . . 10 7. Sandstone, orange-brown weathering, like unit 3, coll. 10-7, Schwagerina dispans., S. diversiformis . . . . . . . . . . . . . . . 1/2 6. Siltstone, like unit 4. . . . . . . . . . . . . 2 5. Sandstone, like unit 3 . . . . . . . . . . . . 1/4 4. Siltstone, mudstone, and shale, interbedded, gray to green-gray and green-yellow weather- ing, very sandy . . . . . . . . . . . . . . . 22 3. Sandstone, orange-brown weathering, silicified in part, a few fossil fragments . . . . . . . . . 1/4 2. Covered, probably light brown silty shale . . . 12 1. Conglomerate, brown, chert and quartzite pebbles (1/2 to 1 inch) dominate, brown ce- ment, and a few dark limestone cobbles (3 inch), unit thins to the SW . . . . . . . . . 0-15 Folded pre-Permian rocks below; coll. 10-0, 1/3 of the way up from base of slope near middle of ridge, from a brown limestone, Triticites milleri.