16. Claystone, increasingly silty downward, 
light gray, some pink mottling. Color- 
ing varies laterally; locally a black band 
in center of bed with yellow stained clay- 
stone below containing weathered ferrugi- 
nous spherulites. 10. 0‘ 
15, Siltstone, carbonaceous, sandy, 1,0* 
14. Siltstone, gray, sandy, massive, much 
carbonaceous matter and pyrite. Massive 
sandstone 2. 0 feet thick comes in locally 
at top. Weathers gray to dark gray with 
local orange, yellow and pink stain, 5,5* 
13. Sandstone, fine-grained, even-bedded, 
massive to laminated, weathers brown 
with local ferruginous stain. 4. 5* 
12. Siltstone, gray, with 1 foot silty sandstone 
in middle part; locally argillacous in upper 
part which is stained pink and purple; 
ferruginous specks (weathered spherulites?) 4.0* 
11. Sandstone, even-bedded to thim —bedded, 
micaceous, brown -weathering with some 
rusty stain on bedding surfaces. 6. 0 1 
10. Shale, silty, gray to brownish gray, thinly 
interbedded with sandstone. Upper half 
dominantly sandy; lower half shaly. 
3. 0* 
