ccxlviii 
APPENDIX. 
predominance of older traps, with other concomitant transition rocks. 
Among them the more prominent are fragments (many indeed only detached 
from boulders,) of well-defined syenite, with red, and others with greenish- 
grey feldspar, the latter approaching to compact in its texture. Epidote, 
which is frequently seen in this syenite, has in some specimens the appear- 
ance of being one of the constituent ingredients of the rock. Other masses 
from Possession Bay are hornblende rock, with disseminated garnets; green- 
stone, apparently primitive, and a greenish-grey sandstone more or less 
impregnated with oxide of iron. There are a few other varieties of sand- 
stone, one of which, more or less streaked with reddish-brown, has all the 
characters of and may possibly belong to the bunt-sandsteiii of Werner; espe- 
cially as there are accompanying specimens of fibrous and fletz-gypsum, 
which formation is generally found with and resting upon the second or 
variegated sandstone, and is often overlaid by shell limestone. Of this last- 
mentioned variety of fletz limestone, there is a specimen among those col- 
lected in the valley of Possession Bay, by Mr. Fisher. This gentleman, it is 
observed, found that valley to consist partly of basalt ; but I have not seen 
any specimens of this rock among the fragments obtained in that place. The 
other rocks from that quarter which have fallen under my observation, 
are chiefly primitive, viz., granite, gneiss, and some mica slate, with horn- 
blende and quartz rock. They exhibit nothing new or remarkable in their 
oryctognostic character. The several varieties of granite differ from each 
other only in the varying proportion of the usual component parts, in their 
grain and colour. Both the gneiss and mica slate contain small imbedded 
garnets, and to the latter of these may be referred a micaceous mass, 
enclosing grains and amorphous masses of noble garnet, intermixed with a 
yellowish-white substance, which seems to be compact feldspar. Another 
substance from Possession Bay which deserves to be noticed, is a variety of 
fibrous limestone, not inferior in lustre, when polished, to the satin spar of 
Cumberland. 
Compared with these rock specimens from the western coast of Baffin^s 
