141 
the normal courses. It is very obvious that in crossing what 
is now the Nantasket Peninsula the ice was strongly influenced 
by the eastward trend of the main valley of the Boston Basin, 
being held to this course partly, perhaps, by the eastward slope 
of the ground and the proximity of the sea in that direction, 
and partly by the continuous barrier of granite 200 feet or 
more in height presented by the south shore of the harbor. 
But when the ice had escaped from this influence by flowing 
out of the harbor into the bay, or by scaling the ledges to the 
peneplain of Cohasset, it resumed more nearly its normal 
south-southeast trend, as shown by the drumlins and the glacial 
striae along the Cohasset shore. 
Directions of Glacial Striae. 
Slate ledge south of Thornbush Hill. 
(a Ue 
Northeast base of Atlantic Hill. 48° E. 
Double dike on Little Gun Rock. 87°-47° E 
Dike 13 in Green Hill Ledge. 80°R 
Slate on the railroad south of N: untasket Station. 
East side of the bay, near the railroad. 
North base of East Porphyrite Hill. 
West ond of Granite Plateau. 
East side of Rocky Neck. 
West side of Rocky Neck. 
South side of Weir River Bay. ... . . 
Jerusalem Road, south of Straits' Pond. 
* “ pear Green Hill Beach. 
35*- enia 
85°. 
41° E. 
40° R. 
80" E. 
EUR THUS 
= z ол ол m ол c cn Ф ол р uu ОО zn tn р tp Ол ОО р р 
Cedar Street, Cohasset. 809-56" E. 
West side of Little Harbor. М 229-259? E. 
Cohasset Rocks, east of GreenHill Bei ITO h. TOS B. 
M o one fourth mile east of beach. 469 E. 
ly i near Pleasant Beach. 400 E 
Beach Island, near the artificial harbor. 329-359 Е. 
ka “ near Pleasant Beach. 259-309 E. 
Strawberry Point, Scituate shore. 959R 
Scituate shore, south of Strawberry P oint. 25?E 
Doubtless the most interesting feature presented by the 
composition of the till is the occurrence of fossil shells in some of 
the drumlins. Mr. Warren Upham has noted! the finding of 
fragments of shells in the sea-cliffs at several points about 
oston Harbor, including the northern member of Tele- 
de, B. 9, N; Ho АУТ, 1972181. 
