CAPE DHEWSTEK. 221 
posed, and which give it the peculiar form and 
structure, are probably secondary trap, consisting 
principally of greenstone and amygdaloid,—spe¬ 
cimens of these rocks being brought by a party 
that I sent on shore near Cape Brewster, and 
others of a similar kind, being found in great a- 
bundauce on some of the floating icebergs in 
the neighbourhood, which doubtless had their 
origin here. In addition to the secondary or 
floetz-trap rocks met with upon these icebergs, w r e 
likewise found specimens of clay-slate of the tran¬ 
sition series, precisely like that which predomi¬ 
nates in Dumfriesshire, and also a number of 
primitive rocks, consisting of granular felspar, 
hornblendic mica-slate, with gneiss and granite. 
Hence, we may infer, that this striking portion 
of the country contains several kinds of primitive 
and transition rocks, besides those of the second¬ 
ary series. The party sent to collect mineralogi- 
cal specimens near Cape Brewster, ascended over 
a fixed iceberg or glacier, to the top of a moun¬ 
tain, about 1500 feet high, where the acclivity 
was so steep, that when a stone was shaken loose, 
it rolled to the bottom, with accelerated velocity. 
I was disappointed in the result of their investi¬ 
gation, in the main, because they neglected to col¬ 
lect specimens of the rocks in general; but some 
of the little fragments they brought were of con- 
