WAVERLY FORMATIONS OF KENTUCKY 77, 
study of Professor Williams’ paper which he quotes and to which 
reference was made above. 
To summarize, then, it may be stated that: The Bedford and 
Berea formations thin rapidly southwestward from the Ohio River 
and this horizon, even after it has been reduced to a thickness of only 
a few inches, can be traced’ to near the crossing of the Cincinnati 
geanticline by the Waverly series. 
The Sunbury shale, on the contrary, suffers but little decline, at 
least until Indian Fields is reached. 
The Ohio black shale of the Kentucky reports or the Chattanooga 
shale of U. S. reports, south of Petersville, is not of Devonian age 
alone but of Devonian and Carboniferous, that is, is composed of 
both the Ohio and Sunbury shales, and a thin zone representing the 
Bedford and Berea. 
The sandstones, which are extensively quarried about Rockville 
Station belong to the Buena Vista member of the Cuyahoga formation 
rather than to the Berea grit. 
The Buena Vista sandstones begin to disappear from Olympian 
Springs southwestward except a single layer which, if not always the 
same, at least occupied the position of the lowest and which persists 
as far south as Stanton if not to Irvine. 
The Linietta clays belong to the lower part of the Cuyahoga for- 
mation. ~ 
The so-called Waverly of at least the Richmond Folio includes only 
the upper part of the Waverly, beginning with the base of the Cuyahoga. 
