Name:  Mica Schist

Geologic Name:  Manhattan Schist

Reference:  Fettke, C.R., The Manhattan schists of south-
eastern New York State and its associated igneous rocks:
New York Acad. Sci. Annals, v. 23, p. 194-216, 1914.

Microscopic characters:  This rock is composed of quartz,
plagioclase, muscovite and biotite with pleochroic halos
around inclusions of zircon.  Pyrite and magnetite are
quite abundant.  Kyanite crystals usually twinned, occur
in places and garnet crystals may be quite large and have
irregular outlines.