552 Report of the State Geologist. 



shore, a distance of some 600 yards. Unfortunately it does not furnish very 

 fresh material. 



No. 3 lies one-fourth of a mile south of the other, and is a beautiful 

 monchiquite. Material may be obtained in which even the olivine is quite 

 fiesh. The strike of this dike would carry it over to the southern part of 

 Valcour Island, and it may be the same dike as the one found there by 

 Brainard and Seely. As far as can be told from the description, the two 

 are quite similar. But in so disturbed a region such identifications are 

 extremely hazardous. 



Schuyler Falls. 



There is little of interest in the geology of this township. The extreme 

 eastern edge of the Burnt hill gneiss comes into the southwestern corner 

 from Peru. With this exception the only rock exposed in the township is 

 the Potsdam sandstone, though it is reasonably certain that the Calciferous is 

 also present in the east, obscured by the heavy sand. The western part of 

 the township is occupied by Potsdam, lying at a tolerably high level, and 

 continuous on the west with the Hardscrabble Potsdam in Saranac. The 

 gorge of the Saranac river, at Cadyville, is cut in the eastern edge of this 

 plateau, and exposes an excellent section. The old channel of the river lies 

 to the northward and is filled to the brim with drift. Along the Salmon 

 river the rock is well exposed at Schuyler Falls village, and less well at 

 Norrisville. In the exposures is much red rock, and some that is tolerably 

 coarse, but w hether low or high up in the formation does not appear. 



Series VI. All the eastern half of the township is heavily covered with 

 sand, the level ranging from •"><><» to 4Q0 feet altitude. Occasional cuts show 

 the clay below. Further to the west the prevailing cover is still sand, though 

 at higher level, and becoming more and more confined to the vicinity of the 

 river. Along the Chateaugay railroad the sand shows grandly, much of it 

 being bare and forming dune-like ridges. Cuts in the river bank at Morrison- 

 ville show an esker-like deposit of coarse sand and gravel, with small some- 

 what rounded boulders. Its summit lacks a few feet of reaching the level of 

 the sand plain, so -that its presence would be unsuspected were it not for the 

 river channel." A precisely similar section is show n along the Salmon river 

 j ii - 1 west of Schuyler Falls, which may represent a prolongation of the 

 same deposit. 



* This esker (?i is noted l>y Mr. Baldwin in Aiiwrican (teologi.it. March, 1SH4, ]>:if»e 177. 



