LIMITS OF THE GLACIATED AREA IN NEW JERSEY. 7 



Session of Tuesday Afternoon, August 15 



The Society was called to order by Vice-President Stevenson, at 2 

 o'clock, and the following paper was read by F. W. Sardeson : 



THE MAGNESIAN SERIES OF THE NORTHWESTERN STATES 

 BY C. W. HALL AND F. W, SARDESON 



This paper will be found printed in full in the succeeding pages of 

 this volume. 



The three following papers, by the same author, were read in succes- 

 sion without discussion : 



A NEW SPECIES OF DINICHTHYS 



A NEW CLADODUS FROM THE CLEVELAND SHALE 



A REMARKABLE FOSSIL JAW FROM THE CLEVELAND SHALE 



BY E. W. CLAYPOLE 



The three following papers were read in succession and discussed as 

 a whole : 



LIMITS OF THE GLACIATED AREA IN NEW JERSEY 

 BY A. A. WRIGHT 



Contents 



Page 



Introduction 7 



Character of the glacial Material 8 



Topography of the Region and its Influence on Glaciation 8 



Determination of the boundary Line 8 



The Altitude of the dei-^rmined Points '. 11 



Parallelism of glacial Boundary and Moraine 11 



Duration and Efficiency of the glacial Ice 12 



Lobes of the New Jersey Moraine 12 



Southeastern Limit of the glacial Ice .^ 13 



Introduction. 



A year ago, at the Rochester meeting of the American Association for the 

 Advancement of Science, I presented a paper on " Extramorainic Drift in New 

 Jersey," in which the endeavor was made to distinguish between the true glacial 

 deposits and those which had suffered some secondary transportation by water or 

 floating ice. The area studied was principally the western part of the state, from 

 Delaware river about Belvidere and Easton eastward to about Oxford Furnace, 

 Washington and High Bridge, the latter on the southern branch of Raritaii river. 



