328 REVIEWS 
were deposited in the Black Hills. A further uplift of several hun- 
dred feet produced a tilting toward the northeast which gave the 
advantage of gradient to the streams on that side of the uplift and 
induced frequent captures of the headwaters of the more southerly 
creeks. 
No traces of glaciation have as yet been found in the hills. 
EB. 
SUPPLEMENTARY NOTE TO CHARLES 5S. PROSSER’S 
PAPER ON “SUNBURY SHALE, OF OHIO.” 
A layer of concretionary sandstone mentioned in the sections on 
Rocky Fork, Franklin county, showing the lower portion of the Berea 
grit and the upper part of the Bedford shale, according to latest obser- 
vations probably belongs in the upper part of the Bedford shale. In 
this case the concretionary layer, No. 2, of the section of the cliff 
below the tree on the farm of John Augen is not to be regarded as the 
base of the Berea sandstone, but in the Bedford shale, while the Berea 
begins with No. 5. Casa Ee 
