Vol. 57.] PEOCEEDINGS OP THE GEOLOGICAL SOCIETY. XCi 



March 20th, 1901. 

 J. J. H. Teall, Esq., M.A., Y.P.R.S., President, in the Chair. 



George Edward Blundell, Esq., Wellington College (Berkshire), 

 and Thomas Andrew Oliver, Esq., Southfield House, Bramcote 

 (Nottinghamshire), were elected Fellows of the Society. 



The List of Donations to the Library was read. 



Mr. H. B. Woodward called attention to a polished slab of 

 Landscape Marble, or Cotham Stone, from the Rhaetic 

 Beds near Bristol, which had kindly been lent for exhibition 

 by Mr. Frederick James, Curator of the Maidstone Museum. The 

 specimen showed that, after the arborescent markings had been 

 produced in the soft mud, some irregular and partial solidification 

 took place in the upper layers of the deposit ; and then, during 

 contraction, a kind of subsidence occurred, of the upper and harder 

 portions into the lower and softer materials. This subsidence was 

 accompanied by a breaking-up of the harder portions, suggesting a 

 comparison (in miniature) with ' broken beds ' and even crush- 

 conglomerates. The specimen was of considerable interest, as 

 illustrating the mechanical changes produced during solidification. 



The following communications were read : — 



1. 'On a Eemarkable Volcanic Vent of Tertiary Age in the 

 Island of Arran, enclosing Mesozoic Fossiliferous Rocks.' 



[Communicated by permission of the Director-General of 

 H.M. Geological Survey.] 



Part I. — ' The Geological Structure.' By Benjamin j^eeve Peach, 

 Esq., F.R.S.L. & E., F.G.S., and William Gunn, Esq., F.G.S. 



Part II. — ' Palseontological Notes.' By Edwin Talley Newton, Esq., 

 F.R.S., F.G.S. 



2. ' On the Character of the Upper Coal-Measures of North 

 Staffordshire, Denbighshire, South Staffordshire, and Nottingham- 

 shire ; and their Relation to the Productive Series.' By Walcot 

 Gibson, Esq., F.G.S. 



[Communicated by permission of the Director of H.M. Gealogical Survey.] 



The following specimens, etc. were exhibited, in addition to that 

 described above : — 



Rocks and Fossils from Arran, exhibited by permission of the 

 Director of H.M. Geological Survey, in illustration of the paper by 



