108 Repokt S.A.A. Adyancemknt op Science. 



There are here no high-veld coalfields, so far. Certainly there 

 cannot be any on the Limpopo side, and on the northern side the 

 Forest Sandstone is too thick for present prospecting. But the deeper 

 erosion towards the big rivers has laid bare tlie coal measures and 

 exposed deposits of good coal. The most important localities are 

 Wankie, to the nortli-west ; Tuli, contiguous to the Limpopo ; Sabi, in 

 the south-east; and the Sengwe, in the north. These sources of fuel 

 thus surround the plateau, and one could hardly expect to find it under 

 conditions more favourable to the future demands of the whole country. 



The Karroo system reaches a thickness of 1700 feet, and probably 

 exceeds that estimate. The general conditions were described by 

 me in 1903,'"" as the result of notes made during expeditions to the 

 Zambesi and Limpopo valleys in pi'evious years. Intentionall}', no 

 attempt was made at the time to correlate the beds with those occur- 

 ring in more southern areas, but with the greater attention that is now 

 being turned to the South African sequence, the present is a fitting 

 opportunity to bring these strata into the aub-continental scheme. I 

 have been unable to augment tlie notes referred to, but the same infor- 

 mation can now be read under a new light. 



The following table lias been adopted by me, and will be Ijriefly 

 explained in this paper : — 



Cape Colony. Transvaal. Rhodesl\. 



♦Stormberg Volcanic Bushveld Volcanic (Batoka Basalts (Victoria 

 series seiies ( Falls) and Tuli Lavas 



^, ciTj. 1) 1 1 1 o 1 ^ I Forest Sandstone (north) 



Ca\e Sandstone Bushveld Sandstone , r. i ^ a ] i. 



(^ and Samkoto Sandstone 



-o c ^ ■ I Escarpment grits 



Beaurort series tt ai i. i i ^ i 



( Upper Alatobola beds 



•o ■ (Lower jSJatobola beds 



Lcca series , . . ■,, , 



i^ (provisionally) 



Dwyka series 1 



There seems to be no ditHculty, owing to similarity of lithological 

 features, relative position, and distribution in correlating the basalts 

 and effusive sheets of the Victoria Falls and of the Tuli district 

 witli the Volcanic series of the Transvaal, and iii recognising in the 

 Bmshveld Sandstone the peculiar features of the Samkoto and Forest 

 Sandstone. Then the massive and ill-assorted Escarpment grits eijually 

 readily fall into line with the Beaufort series. it is to the lowest 

 strata in l^diodesia, the coal-bearing Matobola beds, that a certain 

 correlation cannot be assigned, and owing to the absence of reliable 

 data as to the existence of the Glacial Conglomerate, we miss that 



' "Tiie Sc'<linieiitary Deposits of SoiilInMii lllindosia," Qunrtali/ Ji/iinin 

 tif f]tr (IfolofiirdJ Sorii'tjJ, vol. lix, lOOo. 



