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Page 23, Ulrich notebook Ho. 24. 
Slate Cut, Ohio, Sapt , Monday, 13, 1915. With Cushing. 
Mery warm! 
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..gscs*^ ■ " ■■■-• 
:i "f. | . 1 gfc - 
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Prout Is. 
'1 inches exposed. 
H.R. 
*4*^ I ITT 8 ? ■ 
r **a»^ 
The Huron here is black, Jiard. and very fissile, mak 
it difficult to procure fresn surfaces showing the cono< 
which it contains. Brought about a dozen specimens. 
The Prout Is. is a crystalline rock, apparently 
dolomitic, with corals and crinoidal remains. The corals 
comprise, so far as observed, Zaphrsntis cf. gigantea 
(3 inches in diameter and 1 ft. long) Z. cf. prolifica, 
Heliophllum Halli, Favosites with cells 1/33 to 1/16 inch. 
Upper part of rock usually in "spalls" as though ex¬ 
posed" to weather. In one place across (on south siae ox; 
track it is solid to the top. Generally, however, 4 or 5 
inches at top appear as "shaly." 
ww » » • _ __ 
The 
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s 
extreme top is smooth or but 
slightly uneven, and replaced by 
marcasibe to a depth of 1/8 to 1 
! The upper inch contains occasional green 
spots. Corals sometimes project slightly above general 
level of surface. 
The contact, as intimated, is a sharp but^ even line, 
with no trace of conglomerate or soil. The black shale 
begins at once in typical character and, - under cover 
beyond the oxydafcion of the marcasite, - adheres firmly to 
the limestone floor. 
Beached Milan about noon. Examined good exposure of 
lower member Ohio shale along west bank Huron river, 
beginning about 100 yds. above bridges- Exposure fairly 
well reported by Px*osser except that the beds dip more 
gently at upper end than suggested by him. 
Possible ooundarjCf, ^ 
(b e t we on Bur on 
and 01mste&>-~ 
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