382 Reports and Proceedings — Geological Society of London. 



interest, for, besides the above note, there are papers by Kendall on 

 the concealed coalfields of Yorkshire, Derbyshire, and Nottingham- 

 shire ; C. Johns, Geological Notes on Askrigge ; Stather, on the 

 Geology of Louth ; and Brown, on Janassa hituminosa from the 

 Marl Slate, Thickley. The number is excellently illustrated, and 

 the journal well deserves the place it holds as a record of the 

 Natural History of the North of England. 



ZRIEIROiaTS .A-lsTID I=S,OGE!E]XDIIsrC3-S. 



Geological Society of London. 



June 21st, 1905.— J. E. Marr, Sc.D., F.E.S., President, in the 

 Chair, The following communications were read : — 



1. "The Relations of the Eocene and Cretaceous Eocks in the 

 Esna- Aswan Reach of the Nile Valley." By Hugh John Llewellyn 

 Beadnell, F.G.S., of the Geological Survey of Egypt. 



At the meeting of the International Geological Congress held in 

 Paris in 1900, the author brought forward evidence from the 

 Baharia Oasis and Abu Roash to show that there was a marked 

 unconformity between these two systems in the northern part of 

 the country. The Jebel-Awaina succession shows that in the 

 southern part of the country, where the Upper Cretaceous and 

 the Lower Eocene occur in their fullest development, there is no 

 sharp line of demarcation between the Cretaceous and the Tertiary, 

 and no disturbances in the stratigraphical succession. This is 

 confirmed by the succession in the Kharga Oasis, where there is no 

 trace of an unconformity. Dr. J. Ball's conclusions to the contrary 

 were mainly based on the supposed irregular variation of the Esna 

 Shales ; but where this occurs it is mainly due to the fact that, 

 with a slight increase of carbonate of lime, these beds became 

 almost indistinguishable from the overlying marls and marly 

 limestones of the Eocene. The author finds in Jebel Nur el 

 Ghenneiem some 180 feet of green clays between the Eckinocorys 

 Chalk and the Eocene marls and limestones, and a perfectly 

 conformable succession throughout. Near Ain Amur there is 

 a considerable development of fossiliferous limestones at the 

 summit of the Cretaceous rocks, and many of the fossils are hardly 

 distinguishable from Eocene species. The author is of opinion 

 that the Farafra succession falls into line with that which obtains 

 in the southern part of the country. An important piece of 

 confirmatory evidence is furnished by the discovery of a rich fauna 

 in ' ashen-grey clays ' in the Esna-Aswan Reach of the Nile "Valley 

 by Dr. W, F, Hume, in the clays above the Pecten Marls in the 

 neighbourhood of Esna, 



2. " A Contribution to the Study of the Glacial (Dwyka) Con- 

 glomerate in the Transvaal." By Edward T, Mellor, B,Sc,, F.G.S. 

 (Communicated by permission of the Director of the Geological 

 Survey of the Transvaal,) 



The survey of a district lying east of Pretoria and extending 



