White Oak Flat is in north-central Amador Counry about 10 miles northeast of Volcano. Several moderate-sized deposits of Tertiary channel gravels were mined years ago. There are several gold-quartz deposits including the Marklee mine, which was prospected recently. Bedrock consists of slate, chert, and quartzite. In places the gravels arc overlain by andesite and rhyolite.
Turner, H. W., 1894, Jackson folio: U. S. Geol. Survey Geol. Atlas of the U. S., folio 11, 6 pp.