6 F.. Leverett—Correlation of New York 
may not exceed 10 feet. The inner slope of the beach in this 
highest portion extends down to about as low level as the 
portions to the east and west. This fact, together with the 
fact that neither the beach above this one nor the beach below 
it show unusual height in this portion of their course, leads to 
the conclusion that the unusual height is not due to crust warp- 
ing. <A possible cause is discussed below. 
Another point in favor of the correlation of the Belmore 
beach or * Middle Ridge ” with the Sheridan beach is its simi- 
larity in strength. Were the Sheridan beach much weaker 
than the Belmore there would be doubt as to its being the full 
correlative, even though it has the same altitude, but no essen- 
tial difference in strength could be detected. 
The beaches have not yet all been traced through into con- 
nection with those at the western end of the Lake Erie basin. 
Mr. Gilbert’s studies at the western end of Lake Erie bring 
out a similar series there to that found by Prof. Wright west 
from Cleveland except that there is a still higher beach present 
west from Findlay, Ohio. There is but one beach between the 
Belmore or “ Middle Ridge” and the present shore. This 
beach has an altitude in harmony with the Crittenden beach, 
and in all probability constitutes its continuation. Dr. J. W. 
Spencer considers the Ridgeway beach of Michigan a continna- 
tion of the Belmore beach or “ Middle Ridge.” I¢ this identi- 
fication and that of the writer are correct, the Sheridan beach, 
“Middle Ridge,” “ Belmore beach” and “ Ridgeway beach ”’ 
are but a single beach line. The several names should, per- 
haps, be retained until fuller identifications are made. 
According to our earlier view the lowering of the lake in the 
western part of the Erie basin from 200 feet above the present 
lake level down to 150-170 feet occurred before the later of 
the two moraines which terminate near Cleveland was formed. 
According to the later view it took place at about the time the 
ice-sheet receded from that moraine. The absence of notable 
wave action above the level of the Sheridan beach eastward 
from Cleveland indicates that the higher lake level was not 
held for a long period after the ice-sheet had begun to recede. 
The fact that the portion of the beach east from Cleveland is 
about as strong as that west, indicates that the lake had not 
ne to the lower level much before the ice-sheet with- 
drew. 
A possible cause for the unusual height of the portion of the 
beach near Cleveland may be found in the attraction of the ice- 
sheet. Such a mass of ice would, no doubt, attract the water 
near its margin to an altitude slightly above the normal level 
of the lake. It remains to be determined whether the excess 
of altitude is too great to be due to such an attraction or 
whether other causes may be found. 
