KAME AREAS IN WESTERN NEW VORK 149 
and these show mainly imperfectly assorted gravels. The tops 
and slopes of the hills are frequently of material so fine and adhe- 
sive as to be clayey. Till is found in the high knolls north and 
south of the Harris pond and probably occurs elsewhere. In 
the valley near the Deep pond lies one small but very distinct 
elongated drumlin. No exposures are seen of fine, clear sand 
Fig. 6. MENDON KAMEs. 
View looking west of north over “‘ Big” and ‘“‘ Deep” lakes. 
blown about by the winds as in the Irondequoit and Junius 
areas and other sand areas near Rochester. The materials as a 
whole are varied, but the finer are generally rather adhesive or 
silty. 
Some gravel pits in the borders of kame area show materials 
one-half Medina. Large bowlders of crystalline rock and rarer 
blocks of Niagara limestone occur throughout the region. In 
the middle valley and upon the southern borders of the area fre- 
quent cobblestone fences, one-half Medina, indicate considerable 
