G. F. Wright — Continuity of the Glacial Period. 179 



During the summer of 1893 Professor Wright and myself 

 returned to this field, and the results of our work were pre- 

 sented by him to the Geological Society of America at its 

 meeting last August, and are published in their proceedings 

 (vol. v, pp. 7-13). The accompanying map, prepared by Pro- 



Fisr. 6. 



fessor Wright, shows the limits of the Glacial fringe in New 

 Jersey as now determined by us and its general relation to the 

 moraine. It includes the deposits at High Bridge and Patten- 

 burg, concerning whose Glacial character I expressed doubts 

 a year ago. Further search, however revealed outside of these 

 two localities the evidence which we had considered lacking. 

 In the eastern part of the State the level of the land is so little 

 above tide that it is difficult to distinguish between the direct 

 deposits of the glacier and those which have been distributed 

 by water. But from the central part of the State westward I 

 think there will be no occasion materially to modify our line. 

 Meanwhile Professor E. H. Williams, Jr., has been making a 

 careful survey of the southern boundary of the Glacial deposits 

 in the Lehigh "Valley, and finds them continuing across the 

 Delaware River at Riegelsville, (where it should be said Mr. C. 

 Laubach, a local observer, has for many years been correctly 

 insisting that direct Glacial deposits existed), and extending 

 over South Mountain, to the Saucon Valley near its head, and 

 thence westward several miles south of Bethlehem, into the 

 limestone valley which runs southward from the Lehigh at 

 Allentown, and joins the Schuylkill above Reading. In this 



