pohwatp@si.edu Muscovite Shannon Canyon, Inyo County, California R ocks are made up of minerals. Some...magnesium, manganese, ferric and ferrous iron, lithium, chromium, vanadium, and titanium. Fluorine and...the littleknown locality of Shannon Canyon, Inyo County, California. The specimen is 3 × 4 cm and was collected...in tin-tungsten deposits (such as the Panasquiera mine) and is a constituent of granite, aplite, gneiss...from the Strickland quarry, Portland, Middlesex County, Connecticut. This is typical of the specimens |