﻿[ 207 ] 

 XXIII. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from vol. xxviii. p. 842.] 



November 18th, 1914.— Dr. A. Smith Woodward, F.R.S., President, 



T 



in the Chair. 

 HE following communications were read 



1. ' On a Raised Beach on the Southern Coast o£ Jersey.' Bv 

 Andrew Dunlop, M.D., F.G.S. 



Last June Mr. E. F. Guiton drew attention to a raised beach 

 recently exposed on the southern coast of the island. It is on the 

 eastern slope of the ridge between Le Hocq and Pontac, and the 

 section, facing northwards, shows the following succession of beds 

 from above downwards : — 



Thickness in feet inches. 



(1) Earthy loam, with a layer of rubble 4 



(2) Stiff brownish-red clay 1 



(3) Yellow loamy clay, containing waterworn pebbles and 



angular fragments 3 4 



(4) Coarse brown sand 3 6 



(5) Waterworn pebbles, closely packed in a matrix of coarse 



brown sand 4 6 



The rock beneath is fine red granite. The section is terminated 

 at its western end by sloping rock, and there, between the rock and 

 the lower beds, is a layer of stiff brownish-yellow clay about 

 2 feet thick, which is continued for a short distance under the 

 bed of pebbles. 



The base of the section is about 50 feet above mean sea-level. 



The pebbles in both the upper and the lower beds are mostly of 

 the fine red granite of the locality, but there are some of diabase 

 and of quartzite. as well as a few of flint. Flint is, of course, 

 foreign to the island, but there are many flint-pebbles on the 

 recent beaches, especially on the north-eastern coast. Flint 

 pebbles have also been found in at least two low-level raised 

 beaches, and flint-pebbles and fragments have been noticed in the 

 yellow clay. Pebbles and fragments of Devonian shale have also 

 been found in what appears to be a remaining fragment of a raised 

 beach on the south-western coast. 



Col. Warton recently pointed out a raised beach, not previously 

 noticed, in the railway-cutting near the Eastern Railway-station, 

 This is also on the south side of the island, not far from the coast. 

 Its base is about 55 feet above mean sea-level, and it is covered by 

 <x thick bed of yellow loamy clay. 



2. ' On Tachylyte Veins and Assimilation Phenomena in the 

 Granite of Parijs (Orange Free State).' Bv Prof. S. James Shand, 

 D.Sc, Ph.D., F.G.S. 



The district described is the neighbourhood of Parijs Township, 

 which is situated on the Vaal River and lies upon the northern 

 portion of the Vredefort granite-mass. 



The so-called 'granite' near Parijs is a red and grey streaky gneiss, 



