Eastern Lobe of the Ice-Sheet. — Hitchcock. 29 
high Green and White mountain summits, was to tlie soutli- 
east. Between New England and the Adirondacks in the 
Champlain valley there is a narrow area where a southerly di- 
rection prevailed. The line of no divergence follows down the 
Hudson to about the New Jersey boundary and then termi- 
nates west of the Palisades. In the Catskill region and in 
Pennsylvania the course is to the southwest, and in all the 
maps the striae are made to jjoint at right angles to the great 
terminal moraine from near Easton, Penn., to Salamanca, 
N. Y. 
If these divergent courses are to be interpreted like those 
in the morainic loops further west, as in those connected with 
lakes Erie, Michigan, and Superior, it means that a lobe of 
the ice sheet of enormous thickness started from the Lauren- 
tian highlands and pushed southerly, naturally following the 
depression of the Champlain-Hudson valley. Enough ice was 
moved to override the highest New England and New York 
mountains, while it does not seem to have been urged so far 
to the south as that which pushed down the Mississippi val- 
ley. 
Several general and special peculiarities of the ice-move- 
ment east of the great lakes are better understood in the light 
of this generalization. 
1. In a general way we can speak of a. New York and New 
England lobe of the ice sheet which may or may not have been 
co-eval with those connected with the basins of the great 
lakes. This particular ice current did not extend to the west 
beyond the angle in the moraine near Salamanca, and cape 
Cod represents the eastern limit of what can be observed a- 
bove the ocean level. 
2. There are evidences of morainic material beneath the sea 
as far as to the termination of the submerged Hudson river 
channel — about eighty miles beyond New York. The great 
bar at the end of the fiord is shaped like a moraine or material 
derived from it. Lindenkohl notes the coincidence in direction 
of the submerged channel with the New Jersey moraine as far 
as to the bar, which may have been the extreme end of the lobe 
and thence the edge may be traced northeasterly to Martha's 
Vineyard. Dr. A. M. Edwards has shown by an examination 
of the soundings that the material in this triangular area out- 
