ABSTRACTS AND DISCUSSIONS OF PAPERS 65 



PRELIMINARY GEOLOGIC MAP OF THE WAYAN QUADRANGLE, IDAHO- 

 WYOMING 



BY GEORGE R. MANSFIELD 



{Abstract) 



The rocks of the Wayan quadrangle include some basalt and a long sequence 

 of sedimentary formations representing all the great Paleozoic and later sys- 

 tems except the Cambrian and Silurian. The strata have been complexly 

 folded and faulted. The most noteworthy structural features are the great 

 bifurcated syncline that occupies the central portion of the quadrangle, bending 

 off toward the northwest, and the Bannock overthrust that traverses the 

 quadrangle in an irregular course. There are many minor folds and faults. 

 Besides structural problems, there are many of stratigraphic and physiographic 

 interest. The quadrangle is of great economic importance because of the 

 large body of high-grade phosphate rock that it contains. 



Presented by title. 



GLACIAL LAKES AND OTHER GLACIAL FEATURES OF THE CENTRAL 



ADIRONDACKS 



BY HAROLD L. ALLING 1 



{Abstract) 



Although the glacial geology of the foothills of the Adirondacks has been 

 investigated, the central area, specially the Mount Marcy, Lake Placid, Ausable, 

 and Elizabethtown quadrangles, has not yet received the attention it deserves. 

 Here Pleistocene phenomena are beautifully shown in great abundance. The 

 most interesting features are two series of local glacial lakes, or water levels, 

 ranging from 2,000 down to 500 feet in altitude through a dozen successive 

 stages. They are indicated by deltas, terraces, strong beaches, and channels. 

 In several of the outlets beautiful cataract plunge basins are exhibited. The 

 post-lacustrine deformation of a number of the levels has been determined 

 and indicates that the amount of uplift decreases in passing to the lakes of 

 lower altitude. 



Presented by title. 



PLEISTOCENE FEATURES IN THE SCHENECTADY-SARATOGA-GLENS FALLS 

 SECTION OF THE HUDSON VALLEY 



BY HERMAN L. FAIRCHILD 



{Abstract) 



A map shows (1) the deep flooding by the sealevel waters of the Hudson 

 Valley; (2) the vast areas of detrital plains; (3) the glacial indrainage, espe- 

 cially the Iromohawk; (4) the ice-block kettles of Saratoga and Round lakes. 



The relation of the Iromohawk distributary channels to the Round Bake 



1 Introduced by H. L. Fairehild, 



