Correspondence. , 197 
.... From Big creek westward the Leipsic shore displays perhaps 
three or four times more wave cutting and resultant beach gravel and 
sand than in the vicinity of Brooklyn and east of the Cuyahoga valley. 
There, however, it is unmistakably continued northeastward beyond the 
more northern deposits of the Newburg moraine, so that the later 
part of the Leipsic shore work was done after the ice-sheet had receded 
from its Newburg boundary." (Bulletin, Geol, Society of America, 
Vol. VII, pp. 344, 345.) 
It rem.ains to be determined whether the beach extends eastward 
beyond the western terminus of the Euclid moraine. In case it is found 
to be developed farther east along the face of the Euclid moraine, it 
would follow that the lake was still maintained at this level after the 
ice had withdrawn from the moraine, and the extent of the beach along 
that shore will measure the distance to which the ice had withdrawn 
before the lake level had become lowered. The question of the lowering 
of the lake level, it should be noted, depends not upon the withdrawal 
of the ice from the moraine, but upon the opening of a lower outlet. 
This may have occurred either during the occupancy of the moraine 
or subsequent to it; in either case it would not affect the question of 
the existence of an ice barrier. The significant feature brought out by 
Mr. Upham is the marked change in strength of the beach upon pass- 
ing eastward within the limits of the supposed correlative moraine. 
The portion west from (outside) the moraine is so strong that it has 
long been recognized, while the portion east has been found only after 
a series of close observations by a trained observer of beach phenomena; 
and this observer renders the verdict that the recently discovered east- 
ward extension of the beach displays only one-third or one-fourth as 
much strength as the well known portion of the beach. The discrim- 
inating study carried on by Mr. Upham has served to bring out the 
relationship of the ice to the glacial lake more fully than my own 
studies, but has not invalidated the conclusions concerning the presence 
of an ice barrier at Cleveland. 
The Belmore beach, as indicated in my second paper, probably ex- 
tends eastward nearly to the eastern end of lake Erie. It is well de- 
fined as far as Sheridan, New York, and may possibly continue to 
Hamburg, though the beach is apparently less definite than west from 
Sheridan. From Hamburg eastward, so far as has yet been discovered, 
this beach has no continuation. Its probable correlation with moraines 
near the east end of lake Erie is set forth in the paper referred to, and 
so far as I am aware no evidence against this correlation has since been 
discovered. Much light concerning the outlet of the glacial lake at the 
stage when the Belmore beach was forming, has been shed by Mr. 
Taylor's studies in southwestern Michigan (Bulletin, Geol. Soc. Amer- 
ica, Vol. VIII, Jan., 1897, pp. 39-46). From these studies it appears 
that at the time the Belmore beach was in process of formation the ice- 
sheet still occupied lake Huron and Saginaw bay. The outlet of the 
lake is found to have crossed the "thumb" of Michigan near its north- 
