706 Geological Society : — 



beds became almost indistinguishable from the overlying marls 

 and marl} 7 limestones of the Eocene. The author finds in Jebel 

 Nur el Ghenneiem some 180 feet of green clays between the 

 Echinocorys-Chalk and the Eocene marls and limestones, and a per- 

 fectly 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 Earafra succession falls into line with that which obtains 

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

 firmatory evidence is furnished hy the discovery of a rich fauna in 

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

 by Dr. AY. E. Hume, in the clays above the P^ji-Marls in the 

 neighbourhood of Esna. 



2. 'A Contribution to the Study of the Glacial (Dwyka) Conglo- 

 merate in the Transvaal.' By Edward T. Mellor, B.Sc, F.G.S. 



The survey of a district lying east of Pretoria and extending 

 from near the Diamond-Fields to Middelburg, has recently afforded 

 much additional information with regard to the Glacial Conglo- 

 merate in this part of South Africa. The district lies on the 

 northern edge of the principal area occupied by the Karroo System, 

 and includes a number of outliers, the area between which affords 

 information as to the source of the material of the Conglomerate 

 and the character of the land-surface on which it was deposited. 

 This surface is smoothed, grooved, and scratched by ice-action. The 

 Karroo System is here only 400 or 500 feet thick, and the Con- 

 glomerate usually about 50 feet ; but, where deposited in hollows, it 

 may reach 200 feet or more in thickness. The fragments are usually 

 from 1 to 3 feet in diameter, but may attain as much as 8 or 10 feet; 

 they are often facetted and sometimes show striations. The majority 

 of the boulders are of local origin. True bedding-planes are rare in 

 the conglomerate, but there are included patches of sandstone, mud- 

 stone, or shale, some of which show ripple- or eddy-markings. The 

 striae are remarkably constant in direction, and they and the 

 transport of boulders indicate an ice-movement from the north-north- 

 west to the south-south-east. In the Prieska district Rogers and 

 Schwarz found the movement to have been from north-north-east 

 to south-south-west, and the same direction is given by Schenck 

 from near the junction of the Orange and Vaal Rivers. During 

 1904 outliers of the Conglomerate were found farther north, near 

 the junction of the Elands and Olifants Rivers. 



3. ' On New Oolitic Strata in Oxfordshire.' By Edwin A. 

 Walford, E.G.S. 



The divisions of the Inferior Oolite of North- "West Oxfordshire 

 are described, and a quarry on the border of the county cited where 

 the Cotteswold facies dies out in the 'ParJcinsoni '-stage. A higher 

 division of the same stage (the Trigonia-signata Beds) of North- 

 amptonshire type is shown to sweep over the North-Eastern 

 Cotteswold region. The silico-calcareous beds (Chipping-Norton 

 Limestone) cover the countryside which gives them their name, and 

 are about 30 feet thick. Eossiliferous strata, separated from the 



