196 



GEOLOGY OF THE THIRD DISTRICT. 



not with the lowest rock of the upper one, but with the Calciferous sandrock, the second 

 member, which is finely displayed at both. No section is given of the Potsdam sandstone, 

 as it occurs but in patches, and being an extensive rock in the second district, the omission 

 will be well supplied by Dr. Emmons. 



^^^^ 



Settum of tKc Oap on tie smttk side at Littk-Falls ; directum east and west. 



The above wood-cut, from a section on the south side of the village of Little-Falls, is a very 

 fair representation of the junction of the two rocks, as they appear in the gap, from the east 

 to the west end of it, the water having worn a passage of nearly a mile in length at this place, 

 showing a perpendicular height of over two hundred feet for the calciferous sandrock on the 

 south side opposite the village, at the west end of the gap, and about a hundred feet in eleva- 

 tion of primary rock at the east end. 



These upraised hills or masses, which for brevity have been termed uplifts, show the 

 greater number of the members of the Champlain division. Thus in going south from the 

 village of Little-Falls, you ascend the cliif of Calciferous sandrock from the Primary rock ; 

 then pass in succession to the Birdseye limestone, the Trenton limestone, the Utica slate, and 

 the Frankfort slate and its sandstone, the latter forming the lower part of the Hudson river 

 group, extending south ; being the surface rock of Fulmer valley, and the upper member of 

 the Champlain division, and disappearing under the conglomerate, near Wicks' store in the 

 town of Stark. The succeeding wood-cut (No. 60) exhibits the Champlain division as above 

 given, the star marking Fulmer valley ; on the south side of which, the Oneida conglomerate 

 makes its appearance, being the third rock of the Ontario division, the two intermediate ones 

 not existing at the east part of the district. 



