U. S. GEOLOGICAL SURVEY. 



SCRATCHED 

 yV BOWLDERS. 



CLAY FILLINC 



OF CREVICE. 



3 



5. THIRD TILL. 



4. SECOND SAND. 



3. SECOND TILL. 



2. INTERGLACIAL SAND. 



I. LOWER TILL. 



SECTIONS OF AMHERST HC 



