Notes on the Dwyka Coal Measures at Vereeniging, Transvaal. 71 
Coalk, ak aS ate sh a Ke 2 ae a 1:9 
Grit and pyrites .. ie a a ona mt 2a a (8) 
Dark carbonaceous shale as AS ae ae a ae, ale@ 
Coal .. ve ae bes, ais 5a ie 6p De OO 
Micaceous shale .. Ms oe ae te se a BAe 1:3 
Sandstone and dark carbonaceous shale 8 ci bbe .. 44:9 
Coal (inferior) ae Rs a0 za ue ss he 22:0 
Sandstone and shale - Ed ide 48 Ae ait 25) SRO) 
Conglomerate aa ie ty +h iD ae oP Bs me Mh Ge) 
Coal (good) oe ais i me a M a8 Seek a: 
Shale 8 us a. a whe ae Bd ae oS BO) 
446°6 
Floor Dwyka conglomerate. 
At No. 10 bore-hole, near Cornelia shaft, the section is alluvial 
sand and clay, with pebble bed at base .. ae Bi 25 ORY 
Shale ie ae ae on se oe a oo De ce) 
Coal (inferior) bse oe Be a Me i As ty en O 
Shale he che Ss a th A 3 es Ser a0) 
Coal (inferior) a a ais a es 58 te yt LS:0 
Micaceous sandstone oe oy ae os: oy a3 .. 14:0 
Dark micaceous sandstone i “i tee a eH 30:0 
Coal .. ie ae at op a an oe oe wy HO 
Shale bss ihe a an xf zi oh a eat (26 
Coal. . ¥ ud Me vi 3 a ae a 2: 8:6 
Shale oe He a ne ae ay x4 oe ee te) 
Conglomerate (coaly partings) .. a oe oe ap x: 1 28;0 
Coal .. a es a8 ws Se ne ae a ee LS5O 
Shale = BH be or ee 5s, oh a4 ss 6 - 
Sandstone and conglomerate .. Ae be Ae we 55 OHO) 
Coal .. ee ce si bs ae ae He a oy (46 
Shale a a ay se ae ae ee ue 2.) oO 
Carbonaceous shale a Ot on a Ae 7 ee) 
Conglomerate = oe ae s e _y: ae i: 6 
Coaly shale and pebbles .. a an ae a oe ro, a6 
194°6 
Floor Dwyka conglomerate. 
These three sections will serve to show how variable the con- 
stituents of these coal measures are within even a very limited 
area. 
It is a remarkable feature of the HKeca Beds and the Dwyka 
conglomerate that wherever they are cut even hundreds of miles 
apart the sequence of the beds is much the same, and that beds 
having certain characteristics are easily recognised at vast distances 
apart, For instance, at Grahamstown, above the black and soft 
light-coloured shales there is a bed of what is called ‘‘ Hone Stone”’ 
—shales that break up into angular, narrow strips about 1 inch 
thick. This very same peculiarity recurs at the junction of the Vaal 
and Orange Rivers, also at Pietermaritzburg and elsewhere. Again 
