. Supplement to the appendix of Captain Parry's voyage for the discovery of a north-west passage in the years 1819-20 [microform] : containing an account of the subjects of natural history. Natural history; Sciences naturelles. ccxlviii APPENDIX. rim:-'-? predominance of older (rap*;, with other concomitant transition rocics. Amonpf them the more prominent arc fragments (many indeed only detached from boulders,) of well-defined syenite, with red, and others with greenish- grey fel(l!^j)ar, the latter approaching to compact in its texture. Epidotc, which is frecpienlly seen in this syenite, has
. Supplement to the appendix of Captain Parry's voyage for the discovery of a north-west passage in the years 1819-20 [microform] : containing an account of the subjects of natural history. Natural history; Sciences naturelles. ccxlviii APPENDIX. rim:-'-? predominance of older (rap*;, with other concomitant transition rocics. Amonpf them the more prominent arc fragments (many indeed only detached from boulders,) of well-defined syenite, with red, and others with greenish- grey fel(l!^j)ar, the latter approaching to compact in its texture. Epidotc, which is frecpienlly seen in this syenite, has in some specimens the .ippear- ance of heina: one of tile constituent ingredients of the rock. Other masses from Possession Way arc hornblende rock, with disseminated garnets; green- stone, apparently j)rimiti\\% and a greenish-grey sandstone more or less imjiregnated with oxi(U) of iron. There are a few other varieties of sand- stone, one of which, more or less streaked with reddish-brown, has all tlse characters of and may possibly belong to the binit-samlslciu of Werner; espe- cially as there arc accompanying specimens of fibrous and tlctz-gypsum, which formation is generally found with and resting upon the second or variegated sandstone, and is often overlaid by shell limestone. Of tiiis last- mentioned variety of fletz limestone, there is a sj)ecimcn 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. Tlic other rocks from that (piarter which have fallen under my observation, arc chiefly jjrimitive, 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 col
Size: 1162px × 2151px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectsciencesn
