56 



Report of the State Geologist. 



The details of the junction of the gneiss and Calciferous are 

 given in the following section : 



Section in cut of West Shore railroad, at the " Little l^ose," 

 Randall, Montgomery county, ^N". Y . 



The Calciferous sandstone at the ^'Little JS'ose" has a consider- 

 able thickness and carries some small beds of hornstone, and 

 contains many cavities, lined with quartz crystals similar to those 

 of Little Falls, but not ia such abundance or perfection. Some 

 of the crevices in the rock have been filled vrith lime, by infiltra- 

 tion, forming a calcareous tufa, and contain many bones of small 

 animals and the shells of recent species of Helix. 



From the " Noses " to the escarpment crossing the Mohawk 

 above Hoffman's Ferry the rocks lie in a broad synclinal, with 

 some minor folds. This synclinal includes, al -ng the river, the 

 Calciferous sandstone, Trenton limestone and Utica slate It is 

 terminated at Hoffman's Ferry by a line of fault parallel to the 

 other faults here described. 



Further details of the occurrence and distribution of the rock 

 formations are given in the map accompanying this report, which 

 records the observations made during the past season, no attempt 

 having been made to incorporate it with the published geological 

 maps of this region. 



