TITLES OP PAPERS. 507 



character in the jjjentle slope extending down from the Kaaterskill House for 225 

 feet to the edge of the very steep slopes of the Kaaters kill gorge. A study of the 

 map will, 1 think, furnish various further evidences to the same end along both 

 gorges. 



Glacial influences may have been factors in the development of the gorges, but I 

 do not believe they were important ones. I have ascertained that during the 

 retreat of the glacial ice the Schoharie drainage was ponded by successive ice- 

 dams before the ice had retreated beyond the confluence of the Schoharie and the 

 Mohawk rivers. This gave rise to long, narrow lakes in the Schoharie valley, 

 which at one time outletted into the Delaware river at Grand gorge, a narrow, low 

 divide, at an altitude of 1,574 feet. Possibly at some stage of the ice-retreat the 

 upper Schoharie waters were dammed so high that they flowed out through the 

 wind gaps in the east front of the mountain and gave impetus to the development 

 of the Kaaters kill and Plaaters kill gorges, but this overflow would probably have 

 been very transitory and not of important influence. 



I did not notice any stratified drift in the depression above Tannersville, but the 

 valley contains more or less till up to and across the divide. The drift-filling ap- 

 pears to slope to the westward. 



Mr Barton's paper v^as discussed by W. M. Davis and the President. 

 The following paper was then read : 



MOVEMENTS OF ROCKS UNDER DEFORMATION 

 BY C. R. VAN HISE 



This paper was discussed by several Fellows : A. C. Lane, H. F. Reid, 

 J. F. Kemp, B. K. Emerson, J. P. Iddings and Bailey Willis. The paper 

 is published in the Fourteenth Annual Report of the Director of the 

 U. S. Geological Survey, pages 589-603. 



The next paper was entitled : 



PROOFS OF THE RISING OF THE LAND AROUND HUDSON BAY 



BY ROBERT BELL 



The paper was discussed by G. K. Gilbert, the President and the 

 author. 



The title of the next paper was : 



POSSIBLE DEPTH OF MINING AND BORING 

 BY ALFRED C. LANE 



Remarks were made by C. R. Van Hise and the President. The paper 

 will be published in Mineral Industries, issued by the Engineering and 

 Mining Journal. 



