﻿384 ME. H. BTTRY ON THE EIVER WEY. [May 1908. 



Discussion. 



Dr. R. D. Roberts said that some months ago the Author had 

 shown him the rough draft of the paper with illustrative maps, and 

 had taken him over a part of the ground. He had been greatly 

 interested, and had formed the opinion that the Author was doing a 

 very admirable piece of work. He much regretted the absence of the 

 Author, whom he had hoped to hear in person laying before the Society 

 the results of his observations. It was di£Scult to follow the paper 

 without the maps, and quite impossible to discuss it in any effective 

 way. He felt sure, however, that when the paper was printed with 

 the illustrative maps, the Pellows would find it to be a most inter- 

 esting and valuable contribution to the study of the development 

 of river-systems. 



Prof. Watts stated that the Author had expressed his regret that 

 his absence, caused by illness, had prevented him from reading the 

 paper, and presenting a proper series of illustrations on the screen. 

 He regarded the paper as a very careful piece of work, and 

 thought that it ought to be pubhshed as an example of the researches 

 carried out by the Author in his district. 



Mr. G. W. Young joined with previous speakers in deploring the 

 absence of the Author and of maps to illustrate the paper. He 

 thought that there could be little doubt that the upper waters of 

 the Wey did, at one time, form part of the Blackwater system. In a 

 paper read before the Geologists' Association last year, now passing 

 through the press, he (the speaker) had already suggested that their 

 capture by the Wey was caused by local earth-movements. His 

 view was that the Hog's-Back movement did not take place until 

 long after the general elevation of the Wealden an,ticline, and after 

 the principal river-systems of that district had been established. 

 Then a sharp movement took place in the extreme north-western 

 corner, which bisected the Blackwater system and diverted the 

 head-waters of that stream into the Wey system. Kear Farnham 

 there was evidence of shearing and of both dip and strike-faulting, 

 the latter in one place showing a throw of probably not less than 

 200 feet — for the zone of Terehratuliyia gracilis, the uppermost zone 

 of the Middle Chalk, could be seen abutting against the base of the 

 Lower Chalk. He welcomed the appearance of the paper as a 

 contribution to the elucidation of a very interesting, but hitherto 

 somewhat neglected problem. 



