The Natural History of Chautauqua 



pre-glacial divide. If this view be true, Chautauqua Lake is made up 

 of parts of two valleys, one north-sloping, the other south-sloping, and 

 each dammed by heavy morainic accumulations. 



Adapted and modified from Carroll, Second Geological Survey, 

 State of Pennsylvania; and Tarr, Physical Geography of New 

 York State. 



106 



