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21. Sandstone , fine-grained, thin-bedded, 
cross laminated, to cross-bedded, ripple 
ma rke d , !, worm u *--tracked. Some thin beds 
and partings shaly sandstone and few 
thin layers gypsum. Some Fe— impregnated 
be da in upper 3*0 feet. "We a th e r s buf f . 8 . 5 
20. Shale, silty, dark gray to black, - 
selenitic 5 inter-bedded with laminae 
in A 
and thin layers fine-grained sandstone 
which are ^worm" 1 — tracked, locally 
impregnated. Becomes sandier upward 
sradinn to unit 21 . 
19. Siltstone, clayey in lower 2.5 feet, 
becoming hard, massive, sandy, white - 
wea the ring ledge in upper 2.0 feet. 4*5 
18. Silts tone, clayey, and silty claystone, 
dark gray to black, hard, with car- 11 
honized plant fragments. 5*0 
dis obnf ormity 
La k 0 ts for ma t i 0 n 
17. Slays tone, 
whi te . 
silty, light gray, weather 
2.0 
