Muscovite is a common mica, forming silvery to pale-colored flakes mostly schists and granite pegmatites. It could survive weatheirng, and form sparkling grains in sands and sandstone. ADAMS COUNTY: Muscovite in widespread in quartzite and granitic rocks at Hamilton Mounds, Sec. 31 T.20N. R.7E and sec. CHIPPEWA COUNTY: Occurs alongside bedding planes and in argillites interbedded with the Flambeau quartzite, as exposed in SE sec. 1, SW sec. 2 and NE NE sec. Eleven T.32N. R.7W. and within the SE SW sec. CLARK COUNTY: Found in felsic phyllonite with quartz and K feldspar uncovered below the Mead Dam (SE sec. Major mineral in kink-banded muscovite-chlorite schist and muscovite quartzite uncovered in a small quarry along Co. M in NE sec. 1 T.26N. R.4W., N of the South Fork of the Eau Claire River (Myers, 1977