REPORT OF THE STATE PALEONTOLOGIST 1901 531 



6 The Potsdam sandstone being a litoral deposit, what is its 

 deeper water facies? 



At the request of the state paleontologist and with a view to 

 securing information toward a solution of some of the above 

 mentioned problems, field work was commenced in the vicinity 

 of Plattsburg, Clinton co. and extended southward through the 

 towns of Plattsburg, Schuyler Falls, Peru and Ausable, into 

 Chesterfield, Essex co. Special trips were also made to Wills- 

 boro and Crown Point, Essex co. in the vicinity of which villages 

 the Potsdam has been described as exposed in close proximity 

 to beds of the overlying Beekmantown series. Northward 

 from Plattsburg the work has been continued into the towns of 

 Beekmantown, Chazy, and Champlain. 



The following sections, brief s} nopses of which are given, have 

 been examined with care. 



Valley of the Saranac river from above Cadyville to its mouth 

 at Plattsburg, a distance of 10 miles. 



Valley of Salmon river from Peaseleeville to its mouth, 11 

 miles. 



Valley of Little Ausable river from above Peru to its mouth, 

 7 miles. 



Valley of Dry Mill brook near Valcour, 3 miles. 



Valley of Ausable river from above Keeseville, through 

 Ausable chasm, about 4 miles. 



Valley of Boquet river at Willsboro from village to lake and 

 along lake shore, total o miles. 



Railroad cut along D. & H. track at Burdick's crossing north 

 of Crown Point, about 1^ miles. 



Synopsis of sections 



Saranac river section from near Cadyville to its mouth at Platts- 



hiirg, length about 10 miles 



General strike of beds north with an easterly dip of from 

 5°-10°. Direction of section easterly. Formations Potsdam 

 to Trenton. 



This section is described somewhat in detail as it serves as 

 typical of the middle and upper portions of the Potsdam forma- 

 tion of this vicinitv. 



