A soft extremely fine grained gray rock, with a well developed schistose structure, carrying much magnetite, plagioclase, orthoclase and their alteration products.
The strain to which the rock has been subjected has resulted in a very fine lamination, and it is considerably weathered.
9—Calcarous Sericite Schist.—Seven Miles East of Seal Lake.
A dark compact rock, in which calcite and sericite predominate. Quartz is less plentiful. The results of shearing and pressure are very prominent and bring out the foliation, even in the calcite.
10—Schistose Limestone—Same location as No. 9.
A white rock having a peculiar mottled appearance due to the inclusions of decomposing biotite which project from the surrounding mass of calcite. There is some sericite present, also magnetite, resulting from the decomposition of the biotite.
The bent and metamorphosed condition of the calcite shows the shearing and crushing which the rock has undergone.
11—Phyllite—same location as No. 9.
A dark red, finely laminated rock consisting chiefly of decomposed biotite and feldspar, occasional quartz grains and sericite and much iron oxide.
The rock has been subjected to strong shearing force, producing a good example of schistose structure.