Shale , silty, gray to dark gray, 
carbon* c e ous fragme n ts . 
dis conf ormity 
Lako ta f orrnab ion 
42 * lit -one and silty clays tone, light 'ay 
to white « 
41 • Clay stone, silty, some clayey siltstone , 
massive, white, mottled yellow and orange# 
40# Obscured by slump and s3-ope wash on 
non-resistant beds* 
t 
t 
39* Sandstone, medium-grained# Variable son© 
with channel-fills of massive, cross-lamin 
ted brown-weathering sandstone irregularly 
inter— bedded with friable cross— bedded 
sandstone as in below# 
21 * 5 1 
