178 



Scientific Intelligence. 



"The sedimentary rocks through which the chimney is pierced 

 never show the least shattering or plication." A penological 

 examination of these volcanics (pp. 65-96) shows them to be 

 dolerites and basalts. The common type is the " amygdaloidal mel- 

 aphyre" with long, narrow branching vesicles as first described by 

 Cohen (Neues Jahrbuch, 1875). Mr. A. W. Rogers was appointed 

 acting geologist in 1902, and, in addition to his official duties, sur- 

 veyed parts of Beaufort West, Prince Albert and Sutherland 

 Divisions. A classification of strata has been adopted for Cape 

 Colony which in outline is as follows : 



Dunes ; Alluvium, Later ite, 

 Superficial Deposits. Esturine and Eiver Deposits. 



Pondoland Cretaceous Series 

 Uitenhage Series 



f Stormberg Series 

 ! Beaufort Series 

 ] Ecca Series 

 ^ Dwyka Series 



Witteberg Series 

 Bokkeveld Series 

 Table Mountain Series 



Jlbiquas Series 

 Congo Series 

 Malmesbury Series 

 ( Matsap Series 

 Griqua Series 

 ^ Campbell Rand Series 



'Kreis Series . 

 (^ Namaqualand Schists ? 



The vertebrate fossils from these series are now being exam- 

 ined by Professor Seely ; the plants by Mr. Seward; the inverte- 

 brates by Mr. Lake, Mr. Kitchen and Mr. Chapman. Until 

 these fossils are reported on, correlation will not be attempted. 



It is to be regretted that suitable maps and sections do not 

 accompany these reports. 



4. Geological Society of South Africa (Transactions, vol. 

 vi, parts 1, 2, 4). — The most recent publications of the Geolog- 

 ical Society of South Africa contain papers by E. P. Rathbone 

 on the Geology of the DeKaap Goldfields ; by J. P. Johnson on 

 sections at Shark River and the Creek, Algoa Bay ; by G. S. 

 Corstorphine on the age of the Central South African Coal- 

 field ; by G. A. F. Molengraaff on the Vredefort Mountain 

 Land. The Vredefort region consists of a granite intrusion with 

 zones of metamorphosed sediments. In part 4 are papers by 

 J. P. Johnson, on the Discovery of Implement-bearing beds near 

 Johannesburg in which Eolithic, Palaeolithic and Neolithic forms 

 are described; by A. R. Sawyer on the Origin of the Slates on 

 the Rand and on the Vredefort Granite Mass; by F. H. Hatch 

 on the Black Reef Series; by J. Kuntz on Pseudomorphosis of 

 Quartz Pebbles into Calcite. 



Karroo System 

 (Permian Jurassic ?) 



Cape System 

 (Devonian ?) 



Pre-Cape Rocks 

 In the south and west of 

 Cape Colony 



Pre-Cape Rocks 

 In north and northwest of 

 Cape Colony 



