Faulted Kegion of the Mohawk. 



51 



an angle of 60°, along the base of the cliff of Calciferous just 

 north of the point at which the railroad crosses Broadway. 



The following three sections show the principal relations in the 

 Saratoga region. 





^A X^^'"T 



Figure 10.— Cross sections through the Saratoga region, looking north. TJ. Utica slate. T. Trenton 

 limestone. C. Calciferous. P.Potsdam. ^. Crystalline rock. i^. Faults. 



The fault planes are not exposed so far as I could find, but in 

 outcrops in their immediate vicinity no evidence of upturning of 

 limestone or sandstone was observed. East of the Spring fault 

 the country is covered by drift, and there are no outcrops of 

 Utica slate until in the vicinity of Saratoga lake. 



The faults of the Saratoga region trend approximately north- 

 east and are essentially parallel. Their northern extension has 

 not been fully determined, but the one which passes west and 

 north of the village appears to follow the base of ihe steep front 

 of crystalline rocks which crosses the Hudson river five miles 

 west of Glens Falls and extends to Lake George. There are sev- 

 eral exposures in this belt in which the Calciferous is exposed 

 abutting against the crystalline rocks, although the precise con- 

 tact was not found. It may be an overlap along a steep shore 



