54 Notes upon the Geology of the Western Staies. 
seen along the Ohio, and at Hawesville and other places on the 
Kentucky side of the river. 
- In this notice, I shall present only some of the results of my 
observations; the details of each rock, with other matter, will 
form the subject of a more extended notice hereafter. 
I have already stated that the conglomerate or fundamental 
member of the coal formation is every where to be recognized, — 
whenever we come to that point in the series; it is identical 
with a rock of the same character in southern New York, and 
the bordering counties of Pennsylvania, and holds the same po- 
sition, preserves the same essential characters, and contains the 
same fossils. The lower coal beds can be seen immediately sue- 
ceeding this rock at the falls of Cuyahoga river, on the farm of | © ae 
Henry Newberry, Esq., and also in Jackson, Lawrence and other 
counties of Ohio, The same may be seen at Hawesville, Ky., 
and on the opposite side of the river in Indiana. With the ex- 
ception of the space occupied by lower rocks in western Ohio 
and eastern Indiana, this rock forms a continuous mass of re- 
markably uniform character, from the eastern part of Pennsylva- 
nia to the Mississippi river. 
The old red sandstone group in its red color, and bearing: seales 
of Holoptychus and other fishes, I have already stated in my 
report, thins out on the Genessee river in Alleghany county in 
New York, and does not appear again between that place and 
the Mississippi river, in the direction of my observations. Neither 
in western New York nor in Ohio, so far as I have seen, is there 
any rock separating the Chemung group from the conglomerate. 
The Chemung group belongs to the old red or Devonian sys- 
tem, and which in New York Mr. Lyell recognizes as bearing a 
most striking lithological similarity to the lower part of the old 
red sandstone in Forfarshire and other parts of Scotland, both in 
the grey thinly laminated sandstones and associated green shales. 
This group extends westward through Ohio, bearing its most 
essential characters, but there and in Indiana, more than in most 
parts of New York, it becomes more evidently distinct from the 
Silurian system. The rocks of this group may be seen in Ohio 
at the Cuyahoga falls, occupying a thickness of not much more 
than one hundred feet, while in New York it cannot be less than 
one thousand or fifteen hundred feet. At Akron, and numerous 
other places to the southwest of this, along the western margin 
iene 
a 
ant ee 
ial gt Sn 
