RECESSIONAL ICE BORDERS IN BERKSHIRE, MASS. 357 



There is another series of terminal deposits east of the Farm- 

 ington valley almost as fine as those of the Farmington and 

 Copake valleys. From the moraine north of Riverton the lateral 

 moraine and border drainage is quite clear most of the way along 

 the valley side north to Tolland, where the ice-border turned to 

 the east. Starting with the deposits near Tolland as No. 2, there 

 is a well-defined series running to the north past North Bland- 

 ford, Becket, Washington, and Hinsdale to the moraine north of 

 Dalton, which is the ninth in the series and the same as the Pitts- 

 field moraine. The deposits at Tolland are rather faint, but all 

 the other members of this series are well developed. 



Passing out of Berkshire county into New York we may 

 extend the series from the Lenoxdale moraine to the northwest 

 corner of the Housatonic quadrangle. This may be done by 

 following the series of terminal deposits from Van Deusenville 

 as No. 8 past State Line, and thence north and west past Lebanon 

 Center to moraine No. I2 east of Brainard. From here the 

 series may be extended north to No. 1 5 at East Poestenkill. 

 Outside of the quadrangle a series may be followed from No. 8 

 at Hillsdale to No. I2 at Chatham Center. Or, another good 

 line runs from No. 8 south of Green River past Austerlitz to 

 No. 12 at Old Chatham. 



From the Pittsfield-Dalton moraine (No. 9) the series may 

 be extended northward by two routes so as to surround Mount 

 Greylock. One line runs through Berkshire, Cheshire, Adams, 

 and North Adams to two lateral moraines northeast and north of 

 Williamstown, the last one being No. 1 5 in the series. The first 

 four are terminal deposits. Berkshire village is just north of the 

 col between the Housatonic and Hoosic valleys, and the terminal 

 deposits there and all those along the Hoosic river north of 

 there, were laid down in the water of Lake Hoosic. From 

 North Adams down, the lake was so deep that the terminal 

 deposits are unrecognizable, and the positions of the tongues 

 have been determined mainly by lateral deposits and border 

 drainage features on the flank of the Green mountain range at 

 and above the level of the lake. At Williamstown the lake was 

 500 feet deep. The conditions along the flank of the Green 



