Eighteen miles above mouth of Nascaupee River. A fine-grained rock of gneissic structure having a faint pink color.
Plagioclase, microcline and quartz are the predominating minerals, while biotite, titanite, epidote, apatite, zircon and garnet are present in smaller quantities.
There is also a small amount of hematite, pyroxene and sericite.
The rock, which is of a granitic composition, contains numerous crystallites and has been subjected to considerable strain and crushing, which has resulted in foliation.
5-Mica Granite Gneiss—Country Rock—near Caribou Ridge.
In the hand specimen the rock has the same appearance as No. 4, if anything, it is somewhat more compact.
The principal minerals are, plagioclase, biotite and microcline, with smaller quantities of quartz, iron oxide, pyroxene and garnet.
The feldspar is decomposed with the resulting formation of epidote, which is quite prominent. There are also numerous included crystals.
The rock has been greatly crushed and sheared, and is much finer than No. 4.
6—Cap of Caribou Ridge.