14 NEW YORK STATE MUSEUM 



is a tremendous lateral moraine terrace banked up against the 

 mountain front along the west side of the Kayaderosseras valley 

 and a smaller but similar one along the Mt McGregor front. These 

 would seem to have been deposited along the sides of the ice lobes 

 which occupied these valleys during the retreat of the last ice 

 from the region. They are overspread with sand in varying 

 amount, deposited from streams supplied by the melting ice, which 

 flowed along the margins of the ice lobes between the ice and the 

 valley wall. 



DRUMLINS 



These are oval-shaped hills of drift, chiefly till, supposedly 

 formed underneath a glacier near its end. There is a group of 

 ten or a dozen such hills in the Kayaderosseras valley, grouped in 

 a rude triangle whose apex is the large drumlin just south of 

 Kings, on the Adirondack branch of the Delaware & Hudson 

 Railroad, and whose base extends across southern Greenfield 

 township into northwest Milton. Shaped by the ice, the longer 

 axes of such hills are supposed to trend with the direction of ice 

 movement. In this group the trend varies . from north-south to 

 south 20° west. They show prominently on the topographic map. 



A group of hills of similar appearance, east of Saratoga lake, 

 Schuylerville quadrangle, are rock hills and not drumlins at all. 

 Harder bands in the tipped shales, either chert or sandstone, are 

 responsible for these hills. 



TERRACES 



There are several broad terraces of sand and gravel within 

 the mapped limits, chiefly the delta deposits of streams formed 

 (luring the ice retreat from the region. Batten kill built a great 

 delta in the higher water levels of the time, forming a great ter- 

 race east of the Hudson, banked up against the base of the hills, 

 from Bald mountain southward, the larger part of it being south 

 of the present position of the stream. 



Running southwest from Gansevoort through Wilton is a tre- 

 mendous sand terrace, which continues on into confluence with 

 the similar terrace to the east and south of Saratoga Springs. The 

 summit levels of this terrace are quite like those of the Batten kill 

 delta. Southwest of Saratoga Springs, in Milton township, is 

 another great sand terrace, at a somewhat higher level than the 

 other two. In the valley south of Corinth, hemmed in between 

 the higher grounds on each side, is a smaller sand delta, at a much 

 higher level. 



