over the New Haven Region. : 355 
Since the Connecticut valley trough is not continued over 
the bottom of Long Island Sound, or through Long Island, the 
valley ice, as it moved out over the area of the Sound, left 
behind it those confining limits which had determined its 
southward course; and it is a question of interest whether it 
Bana eye confining limits, or not, in the sides of the Sound 
rough, 
The trend of the Sound is N. 75° E. Now this trend is 
transverse to the course of the upper or southeastward ice- 
stream of the glacier, the direction of this current having been, 
as above shown, S. 15°-25° E 
€ mean direction was between these limits quite to the 
borders of the Sound; for on the Sound, 8 miles east of New 
aven, near Stoney Creek, glacial scratches, covering large 
surfaces of gneiss and granite, have the direction S, 20° to 24° E. ; 
others, 10 to 12 miles west of New Haven, in Stratford (near 
the N.Y. & N. H. railroad), S. 21° to 32° E.; and 18 miles 
west, near Bridgeport, S. 18° to 17° E. : 
Further, the bowlders of Long Island show that this was 
approximately the direction of flow over the Sound. Trap and 
udstone bowlders were carried in great quantities from Con- 
necticut to the island, and the most abundant deposits are situ- 
ated on the parts lying S. 10°-20° E. from the New Haven 
Tegion where alone the Triassic borders the Sound. On the 
horth shore of the island, between Baiting Hollow and North- 
ville, a region bearing S. 10° E. from New Haven, the bowlders 
of trap are very numerous; and the sandstone fragments at one 
Place on the shore hills are in so great quantities that they 
Seemed at first to indicate the existence near by of an outcrop 
of the Triassic 
ather mentions the same fact in his New York Geological 
Report, remarking, on page 170, that from Roanoke Point for 
three or four miles east (points between Baiting Hollow and 
N orthville) ‘‘a large proportion of the bowlders and pebbles are 
of red sandstone and trap rocks, like those of New Haven and 
that Vicinity. In some places these rocks form one-third of the 
mass of bowlders, blocks and pebbles.” He also states (p. 171) 
that a mile west of Wading River (4 miles west of Baiting 
Hollow) “a block of fine-grained limestone containing serpen- 
“ine was found; it was precisely similar to the New Haven 
Verd antique marble.” It was probably from the Milford verd _ 
antique quarry, six miles southwest of the New Haven quarry, . 
Where the rock is more largely limestone than at the latter : 
in which case the mean direction of travel was S. 25° E.; 
from the New Haven quarry, it was ° E. 
On one of the hills in the interior of the island, southwest of 
Riverhead, near Osborn or Bald Hill, bearing S. 15° E. from 
