2 F. Leverett—Correlation of New York 
glaciated district, but the morainic complications are such that 
it was found necessary to work northward nearly to the border 
of the old lake. After the completion of the main line of 
investigation a few days were spent in the study of the features 
in the vicinity of the termini of the beaches, but the approach 
of winter prevented its satisfactory completion. The phenom- 
ena prove to be complicated and in some ways obscure, but it 
is thought that fuller study of certain features may clear up the 
difficulties. It will be observed that an untouched field remains 
at the eastern terminus of the upper (Sheridan) beach, a field 
which is likely to yield definite results when given proper 
attention. This and other defects do not leave in doubt the 
main question of the correlation of the beaches with the mo- 
raines. That the beaches are absent because of the presence of 
the ice-sheet at that time, in the region to the east of their 
eastern termini, is made clear by the position of the moraines 
and their features near the termini of the beaches. Inasmuch 
as opportunity for completing the study is not at present open, 
it seems advisable to set forth the situation so far as now 
understood. 
Mr. Gilbert spent considerable time, in 1886, in the study of 
the beaches here discussed. He has delayed publication in the 
hope of having opportunity to round out the subject. But as 
there is no immediate prospect for doing so, he has kindly fur- 
nished from his unpublished notes some of the data here pre- 
sented. I wish also to acknowledge indebtedness to Mr. Gil- 
bert for a careful revision of this paper, as well as for guidance 
in field observations. 
A word seems necessary concerning the introduction of 
names for the beaches here discussed. They are the names 
chosen by Mr. Gilbert about the time he made the study 
referred to and are the names of towns situated on the beaches. 
It seems probable that the Sheridan beach constitutes the con- 
tinuation of the Belmore, but until this matter is fully settled 
it is considered advisable to use a separate name. The Critten- 
den beach is perhaps the same beach which, on the Canadian 
shore, Dr. Spencer has called the Forest,* but as yet these 
observers have not made sufficiently close connection to render 
the correlation entirely certain. It seems best, therefore, for 
the present to employ both names. 
Lhe Sheridan Beach.—The upper of the two raised beaches 
which border the Lake Erie basin eastward from Cleveland has 
been traced by Mr. Gilbert to Sheridan, New York, a village 
about 30 miles southwest from Buffalo. (See Map, Fig. 1.) 
It is thought by him that the beach may extend to the vicinity 
of Hamburg, immediately south from Buffalo, but he expresses 
* This Journal, vol. xli, 1891, pp. 203-204. 
