STRUCTURE OF MOUNTAINS. 73 
the centre of the Divisions of Western-Beaufort, 
and Grraff-Keinet, carry on the other terrace 
of highlands. This, passing through the more 
Easterly districts of Cradock, Colesberg, and 
Albert, in the Khinoster-Berg, Zuure-Berg, and 
Storm-Berg ranges, and so meeting the Draken- 
Berg or Quathlamba mountains stretches North 
and South through Kaffirland, and reaches 
nearly to Delagoa-Bay on the Eastern coast 
of Africa, and South-western to the Mozam- 
bique Channel. In rear of these, again, are 
other chains lying more inland, not of so enor- 
mous an elevation, indeed, as this last mentioned 
one ; but of considerable importance, although 
no accurate survey of their true geographical 
position and extent has yet been obtained. 
The internal and subterranean formation and 
compositions of these various mountainous dis- 
tricts have, as yet, been but little explored: 
but judging from the few metallic mineral 
samples, which mere accidental research has 
already brought to light, in various parts of this 
continent ; there is more than sufficient grounds 
for assuming them to be largely impregnated 
with iron, copper, lead, and coal, if not indeed 
with the richer and auriferous species of ore. 
Beyond the Kamiesberg, in the division of 
Clanwilliam, (latitude 30°. 50'., longitude 18°. 
45'.) on the South-western coast, considerable 
