REPORT OF THE DIRECTOR I912 83 



7 A small outcrop of Theresa sandstone and dolomite (prol)- 

 al:)ly with underlying Potsdam) near the northern border of the 

 Luzerne quadrangle and one mile due west of High Street 

 village. 



8 The outlier in the Sacandaga valley at Wells, Lake Pleasant 

 quadrangle. This, the largest and most interesting of all the 

 outliers, shows Potsdam sandstone, Theresa transition beds, 

 Little Falls dolomite. Black River (Lowville) limestone, Trenton 

 limestone, and Canaioharie (Trenton) shale. 



9 An outlier showing Theresa beds, Little Falls dolomite, and 

 Black River limestone in the Sacandaga river valley of the Lake 

 Pleasant quadrangle and between one and three miles northwest 

 of Hope postoffice. 



Of these, numbers 7 and 9 have been discovered by the writer 

 within the past three years. 



Besides the above there are a number of other outliers close 

 to the main body of Paleozoic strata as : In the valley one and 

 one-half miles west of Northville (Broadalbin quadrangle) and 

 including Potsdam, Theresa and Little Falls strata; several 

 Potsdam sandstone outliers within the tongue of Precambric 

 rock lying just east of Lake George; and several others in the 

 northwestern portion of the Ticondefoga ciuadrangle. 



Wherever detailed geologic maps have been recently made in 

 the southeastern Adirondacks the region is shown to be literally 

 cut to pieces by numerous normal faults, as many as fifteen to 

 thirty being clearly recognizable within single quadrangles. 

 Most of the prominent faults strike northeast-southwest with 

 throws usually ranging from a few hundred to two thousand or 

 more feet. It is important to note that all the outliers above 

 mentioned as occurring well within the Precambric rock area, 

 except possibly those of the Paradox Lake quadrangle, lie on 

 the downthrow sides of such faults. In the case of the Wells 

 outlier (No. 8) the valley is of the nature of a " graben " or fault- 

 trough vvith a prominent fault on each side so that the block of 

 Paleozoic rock has been dropped down no less than sixteen 

 hundred feet to its present position. Thus there appears to be 

 no escape from the conclusion that the valleys containing these 

 outliers have been largely produced by faulting and that the 

 Paleozoic strata formerly lay at a much higher level, that is, 

 the i^eneral level of the Precambric rock surface. 



