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Page 12, Ulrich notebook No. 24* 
In Porter Creek -?r mile west of Gaboon Creek 
tho lower beds of the Olmsted (,0a to Oh, in¬ 
clusive) contain less flags than in the Cahoon 
section, ^io proportion of dark and black shale 
to the gray also is greater, *he Chagrin, whose 
top lies about 18-20 ft. above the lake, on the 
contrary has rather more and thicker flags and 
particularly of irregularly shaped rusty nods; 
also a foot or two beneath the top a worm bored 
fine earthy red ss. 1 in. _ thick, beneath which 
1 ft. or so the irregularly shaped, nodose to 
finger shaped nods fire very abundant. r ^he con- 
Contact in "^.tact between the Olmsted and the Chagrin in 
places cuts out the top sandstone. 'Ihe 
\ latter seems to bo tho sane layer that is 
beneath the contact in the nearby Cahoon 
/ Creek. 
places cut 
out the top 
sandstone 
flag of the 
Chagrin. 
J 
Black 01nsted 
