Geology and Economic Features of the Pegmatites of Taos and Rio Arriba Counties, New Mexico

abundant arkosic basalt beds Bureau of Mines Canyon chalcocite chalcopyrite chert coal Code 15 commissioner contain copper Creek Dakota sandstone deposits Derry diabase district drilling east exposed fault feet thick feldspar form ratio Fusulina fusulinids Geol Geology granite inspector lands lease lepidolite lessee light gray limestone lower Magdalena formation masses massive Mexico mica miles Mineral Resources Mines and Mineral mining claim Moines Mora County Needham nodular oil and gas oil or gas operations orebody Oscura Mountains outcrops owner Pecos River pegmatite Pennsylvanian Permian permit person Petaca area Picuris places Plate plateau pre-Cambrian pre-Cambrian rocks production quartz quartzite range region rental royalty San Miguel County Santa Fe schist schistosity Secretary sediments septal shaft shale shear zone Socorro specimens stratigraphic surface thereof thin tion Triticites tunnel type locality underground upper valley Vegas veins wall Wedekindellina whorl