Bulletin, Ausgabe 33

20 feet 30 feet wide abundant albite allanite Amazon stone Amelia area Amelia County Amelia-Goochland Amherst County apatite Axton area bands Bedford County beryl biotite biotite gneiss BULLETIN 33 PLATE cent Chestnut Mountain chiefly chlorite cleavage cleavelandite commonly Creek crystals dikes emery enclosing rock epidote feet long feld feldspar feldspar and quartz fine-grained garnet gneiss Goochland area grade grains Henry County hornblende igneous ilmenite inches in diameter inclusions irregular kaolin Leatherwood granite lenticular limonite magnetite masses mica mica schist microcline microscopic mines and prospects Moneta Moneta-Bells area muscovite occurs open cut orthoclase pegmatite deposits pegmatite dikes pegmatites perthitic Piedmont province Pittsylvania County plagioclase potash feldspar production quartz monzonite quartz veins rare minerals reported Ridgeway area rock type Rutherford mines rutile schist schistose sheets spar strike Survey Bull SURVEY BULLETIN 33 texture tourmaline U. S. Geol VIRGINIA GEOLOGICAL SURVEY wall rock Watson Wissahickon schist