![63.0 Biotite-gedrite-quartz-plagioclase gneiss. Booneford, North Carolina. Black biotite and greenish gray gedrite form dark areas, whereas white plagioclase and gray quartz dominate the light areas of this rock. Yellow limonite stains some grains. [Scale shows cm divisions.]](../63.0.JPG)
63.0 Biotite-gedrite-quartz-plagioclase gneiss. Booneford, North Carolina. Black biotite and greenish gray gedrite form dark areas, whereas white plagioclase and gray quartz dominate the light areas of this rock. Yellow limonite stains some grains. [Scale shows cm divisions.]