Reports and Proceedings — Geological Society of London. 179 



5. Dingle Beds. — In a report on the 'Dingle Bed' rocks in the 

 Dingle Peninsula, co. KeiTv (Proc. Roy. Irish Acad., xxix, section B, 

 No. 7, 1912) Mr. Alexander McHenry comes to the conclusion that 

 the true position of the strata is below the Wenlock rocks, and that 

 they are probably of Llandovery age. 



6. Gypsum Deposits oe Canada. — A report on the Gypsum deposits 

 of the Maritime Provinces, Nova Scotia, New Brunswick, and the 

 Magdalen Islands, has been prepared by Mr. W. F. Jennison 

 (Department of Mines, Canada, 1911). The report shows by 

 descriptions, maps, and photographs the vast extent of the deposits, 

 the uses of gypsum, and the processes and cost of manufacturing it 

 into a marketable product. The Canadian gypsum deposits are all 

 regarded as forming part of the Lower Carboniferous. The origin of 

 gypsum is discussed, and the distribution of the mineral in various 

 parts of the world is given. 



7. Climatic Changes in Japan since the Pliocene Epoch. — This 

 subject is discussed by Professor Matajiro Yokoyama (Journ. Coll. Sci. 

 Tokyo, xxxii, art. 5, 1911). He concludes that the temperature in 

 Central Japan has gradually increased since the earlier Pliocene, 

 attaining its maximum in the Diluvial (Pleistocene), and then again 

 decreasing to the present time. No evidence of glacial action has 

 been met with in Japan. 



h,e:po:r.ts ^A-ISTid :PE.oc:BE]iDiisrG}-s. 



Geological Society or London. 



1. January 24, 1912.— Professor W. W. Watts, Sc.D., LL.D., M.Sc, 

 F.E.S., President, in the Chair. 



The following communication was read : — 



" The Upper Keuper (or Arden) Sandstone Group anH Associated 

 Bocks of Warwickshire." By Charles Alfred Matley, D.Sc, P.G.S. 



Under the name of the Arden Sandstone Group the author 

 describes the stratigraphy of a sandstone zone in the Keuper Marls 

 of Warwickshire, which is exceptionally well exposed in the area 

 formerly occupied by the Porest of Arden. 



This zone varies in lithological composition and thickness. It is 

 never wholly a sandstone, but always contains beds of light-grey and 

 pale-green shale, marl, and mudstone, which in places make up 

 almost the whole of the zone. The sandstone, where present, usually 

 forms thin, flaggy, white or light-grey beds, and exhibits ripple-marks, 

 current-bedding, and surfaces with footprints and sun-cracks. The 

 zone contains Estheria minuta; plants; teeth, spines, and scales of 

 fishes ; tracks and remains of labyrinthodonts and reptiles ; and 

 occasional casts of molluscan shells. The band is typically 20 to 

 25 feet thick, increasing sometimes to 40 feet or more ; but it thins, 

 especially eastwards and south-eastwards, to 4 or 5 feet. 



The zone was first described by Murchison & Strickland in 1837, 

 but has not hitherto been completely mapped. The author traces 



