53 2 
The Ohio Naturalist. 
[Vol. XII, No. 7, 
SUMMARY: 
There seems to be sufficient evidence on which to base the 
conclusion that no large lake occupied the plain to the west and 
southwest of Newark after the recession of the late Wisconsin 
time. 
The heavy bed of gravel between the late Wisconsin and 
Ulinoian clays cannot have been deposited in a lake. 
During the recession of the Wisconsin ice sheet a loop moraine 
was formed across the ancient valley of Jonathan creek just east 
of Thornville station. 
The water imponded between the ice and moraine converted 
the lower portion of the valley into a lake. 
The waters broke through the moraine forming a well defined 
overflow channel, not deep enough however to completely drain 
the valley. 
This ancient basin is now occupied by Buckeye Lake. 
The evidence obtained from gas well records corroborates the 
statements made by Read, Tight and Leverett of the existence 
and establishes the location and extent of Newark valley a pre- 
Ulinoian valley from Newark, southwest to the Franklin county 
line. 
This work was done under the direction of Dr. George D. 
Hubbard, now of Oberlin College, to whom I am much indebted 
for the assistance given in the field work and thru suggestions 
concerning and criticisms on this paper. I also take this oppor- 
tunity to acknowledge my obligation to Miss Clara G. Mark for 
the excellent photograph and to Messrs. Bootin and Sawyer of the 
Canal Commission for information of Buckeye Lake. 
Date of Publication, May 21, 1912. 
