154 EELATTON- OF THE WESTLETON BEDS TO THOSE OF NORFOLK, ETC. 



older, and the Westleton Beds have lapped over them. Even if older 

 than the escarpments, the beds were evidently newer than the 

 elevation of the Weald. 



Prof. Hughes pointed out the difficulty of correlating unfossiliferous 

 and variable beds when they were separated by considerable intervals. 

 He thought that movements along the Weald-axis and affecting 

 all East Anglia had occurred many times down to a late age. The 

 Glacial beds rest quite irregularly on the higher- and lower-level 

 gravels of Hertfordshire. The Hertford-Heath beds had, he believed, 

 nothing to do with the Glacial deposits, but that between them there 

 had been an elevation, denudation, and resubmergence of that area, 

 and that the ingredients of these beds might have come from the 

 north and west. The pebbles became smaller, tracing the stones from 

 Hertford Heath to Hampstead, where he recognized Uvo Pebble-beds, 

 the upper with quartz being the equivalent of the Hertford-Heath 

 beds, and the lower being the Bagshot pebble-bed. He had traced 

 them along the top of Epping Forest also, and would look for them 

 on the North Downs. The Sheppey gravel was an angular one, 

 and different from that of Hertford Heath : whilst there was a 

 gravel near Chatham on the mainland opposite Sheppey of different 

 origin, being the deposit of a stream flowing northwards from the 

 Weald. He shared the general regret that the Author was unable 

 to be present, especially as he could probably have cleared up some 

 of these difficulties either by reference to parts of the paper which 

 had not been read or by supplementary remarks. 



Mr. J. Allen Beown had collected rocks from the high-level drifts 

 of the Thames valley, and there was no doubt as to the occurrence 

 of southern drift therein, though the northern drift preponderated. 



Mr. MoNCKTON agreed with the criticism of Prof. Hughes. There 

 is a considerable break in the continuity of the proposed Westleton 

 Beds north-east of High Beech, Essex. 



The East-Berkshire plateau-gravels were shown in one of the 

 diagrams; they were very different from the High-Beech gravels — 

 quartz was, for instance, verj" rare in them, and he had placed on 

 the table the only large block of quartz he had found in them. 



Dr. Ieving was sceptical as to the identification of the Berkshire 

 gravels with those of Essex and Suffolk. The Author appeared, 

 since his York paper, to have altered his views as to the date of the 

 upheaval of the Weald. He was in accord with Prof. Prestwich 

 as to a certain amount of glacial erosion, by which he meant 

 the work done by floating ice. He believed that the plateau-gravels 

 were themselves fluviatile and of much older date. 



Mr. Maee stated that if the paper had been read in full many of 

 the questions raised by the previous speakers would have been 

 answered. 



