86 PROCEEDINGS OF THE PRINCETON MEETING 



DELAWARE TERRACES 

 BY N. H. WINCHELL 



iAl)8tract) 



In this paper the author critically examined the report of Prof. R. D. Salis- 

 bui'v and the conclusions to which he comes as to the correlation of the ter- 

 races below the glacial moratue south to Trenton. He pointed out the incon- 

 sistencies of that scheme — ^a scheme which is based on the dominant idea that 

 the terraces as far as Trenton are due essentially to the action of the floods 

 of the Wisconsin ice-epoch. The author called attention to the presence of 

 an older drift in New Jersey, extending as far south as Trenton, called "Co- 

 lumbian" or ''Pensaukeu,'' which he parellelized- with the Kansan, and to this 

 epoch he assigned the "high terraces'* of Salisbury, and to the Wisconsin he 

 attributed but little of the accumulation of the well known Delaware terraces. 

 He called attention to the necessarily flooded stages of the Delaware at the 

 dates of the Glacial epochs which have been found, in the central western 

 part of the country, to have occurred in the interval between the Kansan and 

 the Wisconsin epochs, and to these epochs he assigned the yellow sands which 

 are distributed copiously over older terraces at Trenton and northward nearly 

 to the latitude of the WLscon-sin moraine. 



Eead in abstract from manuscript. 



SUBLACUSTRIXE GLACIAL EROSIOX IX MOXTAXA 

 BY WTT.T.TAM M. DAYIS 



iA1)8fract) 



Chief among the results of a Shaler Memorial Fund study in the summer ■ 

 of 1913 is the following : The great Kootenay-Pend" Oreille Glacier, which 

 overdeepened the trough of Kootenay Lake in Canada, crossed the Interna- 

 tional Boimdary into the United States and there divided into three branches. 

 One branch ascended the upper valley of Clark Fork southeastward in north- 

 western Montana for 100 miles and barred its waters, which thereupon rose 

 in. a large and very irregular lake of fluctuating level, the faint shorelines of 

 which indicate a maximinn depth of 1.000 or 1,200 feet and an altitude of 

 about 4.000 feet. Near its middle this branch glacier oversteepened the valley 

 sides to heights of 1,000 feet or more : near its end to heights of 600 or .300 

 feet. If the greatest depth of the lake was contemporaneous with the greatest 

 advance of the ice. as seems probable, the terminal part of the branch glacier 

 must have done its erosive work while deeply submerged in 1,000 feet of lake 

 water. 



Presented in full without notes. 



