32 
O THE JOURNAL: OF GEOLOGY. 
On the slopes light-drab, pea-green, vermilion, chocolate, 
maroon, and buff-colored shales of various shades alternate 
11. Massive stratum of concretionary limestone - - 
1226 
mee 
Reddish-brown, sandy shale - - < 2 
a. Thick-bedded, dark reddish-brown sandstone’ - - 
6. Same, thinly bedded - : Z 
Total thickness of upper division - - 
Feet. 
70 
70 
140 
1700 
The last two beds form so strongly marked a horizon in the 
shaly beds that it is taken as a rough division line in the terrane, 
the strata beneath containing a different character of limestone 
that serves to distinguish them. 
LOWER DIVISION. 
. Brown sandy shales, passing below into chocolate and dark 
argillaceous shales that alternate with brown and greenish, 
sandy shales. Near the summit a layer of odlitic iron ore 
occurs - - - - . - - 
. a. Alternating sandy and argillaceous shales, with thin belts of 
limestone from 6 inches to 4 feet in thickness - - 
6. Stromatopora limestone - - : se Ss 
c. Dark shaly limestone - - - : a 
d. Dark argillaceous shale - - : 3 
e. Dark-gray shaly limestone in massive layers - - 
. Chocolate-brown, dull and yellowish-green, sandy and argil- 
laceous shales, with sandstone in narrow bands, and 21 feet 
of limestone in thin layers near the middle and base of the 
stratum - - - - - - - 
. a. The sandstone and sandy shales become less prominent, 
the argillaceous and calcareous strata replacing them, 54 
feet of limestone occurring in 500 feet of strata - - 
6. Dark clay-shale - - - - - 
c. Dark shaly limestone - - - - - 
d@. Dark argillaceous shale - - - - 
e. Gray limestone, having a tendency to break up into shaly 
layers; strongly bituminous near the base - - 
jf. Friable, rather coarse, gray to buff sandstone - - 
g. Compact lead-colored limestone - - - - 
Feet. 
31 
O 
NR AW £- 
Feet 
300 
‘at 
N 
N 
