![33.0 Feldspathic arenite. Lone Tree Creek Quadrangle, California. A few black biotite, chert, and lithic clasts, plus cream-colored feldspar grains and variously colored, but dominantly gray, glassy quartz grains, dominate this sandstone. A small amount of hematite cement gives the rock a light pink cast. [Scale is standard GSA scale with cm divisions.]](../33.0.JPG)
33.0 Feldspathic arenite. Lone Tree Creek Quadrangle, California. A few black biotite, chert, and lithic clasts, plus cream-colored feldspar grains and variously colored, but dominantly gray, glassy quartz grains, dominate this sandstone. A small amount of hematite cement gives the rock a light pink cast. [Scale is standard GSA scale with cm divisions.]