12—Quartzite—Same location as No. 9.
A compact rock of light red color, made up of uniformly rounded grains of quartz, and the feldspar with occasional grain of magnetite.
A fine siliceous material discolored by iron oxide, acts as a cement between the grains.
The quartz grains show secondary growth. 13—Altered Gabbro—Thirty-two Miles Above Wuchusk Nipi on Nascaupee River.
A coarse dark green rock whose principal constituents are pyroxene plagioclase and magnetite.
There is a slightly developed diabasic structure and the rock is much altered by weathering; the resultant product being chlorite.
14—Quartizite—Bibiquagin Lake.
Hard compact rock of light red color, cut in all directions by narrow veins of quartz, from microscope size to one-half an inch in width.
The grains of the constituent minerals, quartz, feldspar and magnetite have an angular brecciated appearance; showing uneven extinction and strong crushing effects.
The magnetite is somewhat decomposed, the resulting hematite filling the spaces between the quartz grains.