over the New Haven Region. 345. 
were derived from the trap and sandstone of the valley, that is, 
were taken up in the valley and transported along the valley 
The proof is hence positive that the transporting agent moved 
down the valley, gathering the stones and earth by the way, 
and, sooner or later, depositing also by the way. The mean 
course of the Connecticut valley in Connecticut, from the 
Massachusetts boundary to New Haven ay, is 8. 17° W., and 
this is about the mean course of the scratches and drift. 
6. Directions of the bottom movement over the New Haven re- 
gion; the large amount of WESTING along the western border and 
beyond over Orange and Milford. 
he glacial scratches in the eastern part of the New Haven 
Tegion, over Hast Haven, avout the various opened quarries, 
Indicate a movement in the direction S. 18° W. The usual 
trend of the sandstone ridges of Hast Haven is about the same, 
Showing that they owe their forms to glacier abrasion. Sa- 
chem’s Ridge (Sm on the map), made into a ridge by the 
ploughing glacier,* because of the protecting Mill Rock to the 
north, has a trend of S. 114° W. In Hamden, farther borth, 
the “Quinnipiac Ridge’’ (similarly carved out by the glacier 
€cause under the lee of Mt. el) has the mean course 
6° W. The valleys and sandstone ridges west of this ridge 
have nearly the course of the West Rock ridge to the west o 
them, or S. 26° W.+ Along the western border of the New 
aven region, in Orange, the course at the many scratched 
ledges is S. 26°-38° ., and mostly S. 33° W. But it varies 
Over Maltby Park, (M on map) to S. 45° W. and S. 56° W. 
OWlng to local conditions. 
a Ploughing deeply over the soft sandstone formation, but feebly abrading over 
@ trap. * : 
+ An. exception as to westing occurs two miles north of Westville in proalhong 
Tow West River valley, where the course of grooving over the slate rocks te 
tet an exceptional course evidently due to the form of the surface at the 
place, 
