Macroscopic: Biotite, muscovite schist. This sample was a part of a roof pendant, or a piece of rock the surrounded a batholith. Likely part of the silimanite zone. Microscopic: This sample under thin section displays an almost entirely mica and quartz composition. Thin section pictures in XPL unless otherwise noted in the title of the picuture. Thin sections are 3mm across.
Number of Thin Sections