Btkxn Ctmiicl Si^ttiait. 



By Prof. C. LLOYD MOTIGAN", F.G.S. 



IN tho section across tho rivor Severn wHcli accom- 

 panies Mr. Ciiarlos Richardson's paper, there are several 

 features of geological interest. I propose very briefly to 

 draw attention to some of these under four heads : (1) The 

 Alluvial Bods, (2) the Trias, (3) tho Palocozoio Rocks, (4) 

 the Rivor Channel. 



1. Tho Alluvial Beds.— Mr. W. G. Luoy has kindly given 

 me permission to malce nse of the following note : — 



" On tho visit of the Cottcswold Club to the Severn 

 Tunnel, in May, 1885, I made a very liurried inspection 

 of the Drift. In coming from South Wales, after leaving 

 the tunnel on tho Bristol side, the cuttings aro full of in- 

 terest. The upper surface consists of about ton feet of 

 Yellow Clay, one or two feet of Peat, six feet of Blue Clay, 

 one foot of Peat, five foot of loamy Sand, and then a mass of 

 Gravel, twelve to eighteen feet thick, resting upon New 

 Red Marl. There is evidence of the existence of at least 

 four pills " (marked " mud " on tho section), " cutting through 

 the alluvium, occurring at diJferent levels. The bottom of 

 the largest is six feet under present low water level in the 

 channel. Cardium cdulo and Tellina solidula were found in 

 the bed of sand in the gravel. Tlic bottom bed of the gravel 



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