Mooreville Ridge is in southwest Plumas and southeast Butte Counties. It includes the Camel Peak and American House areas. A number of Tertiary channel gravel deposits in the area have been mined largely by hydraulicking. The South Fork of the Feather River, which flows through the district, was mined also in the early days and skin divers are active in the area now. Bedrock in the district is granite, slate, serpentine, and amphibolite. The ridges are capped by Tertiary andesite and basalt. A few gold-quartz veins occur in the district.
Butte County: Dodson hydraulic, Golden Trant, Ludlam hydraulic, Walters. Plumas County: American House hydraulic, Browns Hill, Davis Point hydraulic, Fall River, Sanborn, Walters.
Lindgren, Waldemar, 1911, Tertiary gravels of the Sierra Nevada: U.S. Geol. Survey Prof. Paper 73, pp. 99-100.
Turner, H. W., 1898, Bidwell Bar folio: U.S. Geol. Survey Geol. Atlas of the U.S., folio 43, 6 pp.