180 T. C. « HAMBERLIN — THE [NTERGLACIAL [NTERVAL. 



altitudes of 1,075 to 1,100 feet, and above that level there is no deposit — 

 there is simply the decomposed shale and rocks in place. Why should these 

 clay deposits cease near thai prescribed level if there has been no submer- 

 gence during the later history of this valley ? 



Mr. McGee: To correcl a possible misapprehension, I beg to say thai the 

 point which I raised a few moments Bince is an altogether subordinate one. 

 Id regard to the general subjecl of President Chamberlin's communication, 

 I am in perfect accord with him; and having gone over very much of the 

 ground he has described, I can testify to the correctness of his statements oi 

 fact. And I should Like to add that I consider bis communication an • 



dingly important < tribution to the complex Bubject of Pleistocene his- 

 tory. 



Wiih respect to the phenomena aboul Belvidere, I desire to add a 

 word: I have been on the ground; I am familiar with the nice of the coun- 

 try; I have studied the moraine with its overwash terraces, and the more 

 impressive terraces upon which the moraine was pushed, and bo I speak with 

 some confidence concerning the phenomena. <)n the outer Bide of the 

 moraine lie the early Pleistocene Columbia) terraces, one of which must 

 be fully two miles in width and four or five in length, constituting the great 

 topographic features of the region. On the other side of the moraine and 

 along its Blopes there may be oewer terraces, but if so they are bo .-mall that 

 they escaped my observation, although I traversed the ground in search of 

 jusl such phenomena. 



