muscovite biotite granite [ two mica granite ]: hypidiomorphic, granular. Plagioclase is abundant and shows microperthite intergrowths. Microcline; both biotite and muscovite are present; quartz large grains. Two mica granite and differs from Foxdale
Locality details
spoil of Cornelly mine, 1.5 miles NE of Foxdale.: granite with biotite