I« Section ne&r Plvtteville# 
■»■■■■>■..i »-..1 - -- - f | - r ■ ■ •- i ,'. j-nmi • r t -i 7 "hi jj. 
Sub crystalline, magnesian lineston© at 
base, but in 2 or 3 feet grading into 
co&re©, thick-beddod dolocdte* ------ ZO 
m 
P/i ^ * 
Blue to : ;ray calcareous 
shale or sh&ly 
Hasten© • 
fhin-badded , sub-crystalline li^s&tone* 
A few specimens of Orthis tricor.>,ria Conrad 
arid UiPervota Conrad * 5 
Thin, ^avy-badded, gifes rock-like lias- 
nitons, '■ seorai*v; r .ub -crystalline above# Soai# 
beds are very fossilif©roue* Orthis 
trlcenaria Conrad # 0* ponreta Conrad, and 
0* t©?tud inaria Dal man* - -- -- -- - 6 
Dark brown or chocolate-colored ©halo or 
oil rock *-- —--- 
Thin, v?avy-bedded /;lf.ss rock-like ] i n re* tone; 
commonly very fossil!ferous; a few thin 
partings of oil rock* Orthis sricenaria 
Conr&d, 0 , perveta Conrad, 5 ^ropho ,cna 
