68 NEW YORK STATE MUSEUM 



(Theresa) beds between the two, the writer does not know. In 

 any case, it is quite certain that the rocks of this outher are to be 

 classed with the Potsdam-Little Falls series in general. 



Significance of the Outliers 



The significance of the outliers of Paleozoic rocks at and near 

 Schroon Lake should be considered in the light of all the outliers 

 of Paleozoic strata in the southeastern portion of the Adirondack 

 region. Altogether they afford positive evidence that early Pale- 

 ozoic sea waters spread over all or nearly all of that region. All 

 the definitely known outliers which occur well within the area 

 of Precambrian rocks of the southeastern Adirondacks are as 

 follows : 



I A small exposure of Potsdam sandstone near the southwestern 

 corner of the Elizabethtown quadrangle. 



2, 3, 4 Three small areas of Potsdam sandstone along the, eastern 

 side of the Paradox Lake quadrangle. 



5 Little Falls ( ?) dolomite at Schroon Lake village. 



6 Potsdam sandstone ijA miles southwest of Schroon Lake 

 village. 



7 A small area of sandstone and dolomite belonging to the Pots- 

 dam-Little Falls series 2^ miles due north of Schroon Falls in the 

 Paradox Lake quadrangle. 



8 A. small mass of Potsdam sandstone i^ miles west of North 

 River village in the Thirteenth Lake quadrangle. 



9 A small body of sandstone and dolomite belonging to the Pots- 

 dam-Little Falls series i mile west of High Street village in the 

 northern part of the Luzerne quadrangle. 



10 A large outlier, several miles long, in the Sacandaga river 

 valley at Wells in the Lake Pleasant quadrangle where are well- 

 exposed Potsdam sandstone, Theresa transition beds. Little Falls 

 dolomite, Black River (Lowville) limestone. Glens FaTs Tr^esto-'^ 

 and Canajoharie (Trenton) shale. 



II A considerable outlier showing Theresa beds, Little Falls 

 dolomite, and Black River limestone between i and 3 miles north 

 of Hope in the Sacandaga valley of the Lake Pleasant quadrangle. 



Of these, nos. 6, 7, 9 and 11 have been discovered by the writer 

 during the last 6 or 7 years. Besides the above, a number of out- 

 liers occur close to the main body of Paleozoic strata. 



Wherever detailed geologic maps have been made in the south- 

 eastern Adirondacks, the region is shown to be literally cut to 



