LOCALITIES OF SUPERPOSITION. 

 60. 



197 



Section from the south, side of lAtUe-FdUs : Direction north and south. 



No. 1. Primary rock or system. 



2. Calciferous sandrock, or group, 



3. Birdaeye limestone, 



4. Trenton limestone, 



5. Utica slate, I 



6. Hudson river group, lower part, 



Champlain division, in part. 



7. Oneida conglomerate, ) ^v_. . ,. . . . ^ 



8. Clmton groSp, f O"""" ^''"""'' '" P'"^" 



lo! Watefw gro^."''' I Helderberg division, in part. 



* Fulmer valley. 



From the absence of the upper part of the Hudson river group at the middle and east end 

 of the Mohawk valley, the following wood-cut is given, which represents a section, passing 

 west from Black river, terminating with the sandstone shale of Pulaski, being the upper part 

 of the Hudson river group and Champlain division. 



Section west of Black river. 



No. 1, Primary rock. 



2. Black river limestone. 



3. Trenton limestone. 



No. 4. Utica slate. 



5. Frankfort slate, and 



6. Sandstone shale of Pulaski, j 



• > Hudson river group. 



The continuation of the section from Black river in a southwest direction, carries you over 

 the surface of the Grey sandstone, which is well exhibited at the falls on the north bank of 

 Salina river, and more finely at the great falls on the main river, where it is about one hun- 

 dred and twenty feet in thickness. From the grey, the next rock in succession is the Medina 

 or Red sandstone, which covers the greater portion on the south side of the west part of 

 Oswego county. Then follows the Clinton group, which terminates the Ontario division, the 

 Oneida conglomerate not having been seen in place in that county. 



