ON TOPOGRAPHICAL AND GEOLOGICAL TERMS USED IN S, AFRICA. 295 



Vlakle — 



■ Flats,' a wide tract, of flat country or plain . 



Vlei (often spelled Vallei or Valley) — 



A flat track of countr)' or area of gentle slope which is periodically subjected to 

 flooding ; a wide pan of inconsiderable depth. 



Vloer — 



A ' floor." This term has much the same meaning as Vlei. 



Waterval — 

 Waterfall. 



Class II. — Names of Rocks mid Minerals. 

 Amandel Klip (almond-rock) — 

 Amygdaloidal lava. 



Bacon- rock — 



A term used by Barberton miners to denote the reddish cherty or jaspery variety 

 of the banded ferruginous quartzite. 



Banket — 



A term applied to the Witwatersrand conglomerates on account of a supposed 

 resemblance to an almond ' cake ' made by the Boers. 



Bantom — 



A term used by alluvial diamond diggers to designate striped or banded 

 pebbles (magnetite-quartzite or slate, or magnetite- jasper rocks). 



Bar — 



A term used by miners to denote a conspicuous band or seam of rock, dis- 

 tinguished by some character such as hardness or colour, e.ff., Red Bar. 



Blaauw-grond (blue ground), Kimberlite — 



The unoxidised portion of the filling of the diamond pipes. 



Blue Ground. See Blaauw-grond. 



Boyisman's Eli]) (bushman's rock) — 



A term applied to the Dwyka of Southern Cape Colonj' owing to the jagged 

 character of its weathered surface. 



Calico-rock — 



A term formerly used by the Marabastad miners for a banded magnetite 

 quartzite, usually in alternating black and white bands. 



Drip Kalk (drip- limestone) — 



Stalactitic material. 

 Float— 



A term used by miners for surface fragments— drift, rock not in situ. 



Floating Reef — 



A term used by diamond miners for the masses of the ' country,' or foreign rock 

 occurring in a diamond pipe. 



Oruia — 



Shale, mudstone, or soft variety of Dwyka, 



