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Placer Co., California, USA

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Location is approximate, based on center of defined region.
Latitude & Longitude (WGS84): 39° North , 120° West (est.)
Neighbouring regions:

NOTE: The USGS staff reporter(s) who worked on the localities in this county repeatedly refer to the mine workings as including one or more "tunnel(s)." A tunnel is technically a through openings with 2 portals. In all likelyhood, the majority of these "tunnels" are probably adits (one portal).

Mineral List

Mineral list contains entries from the region specified including sub-localities

70 valid minerals.

Rock Types Recorded

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Localities in this Region


This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Silliman, Benjamin, Jr. (1867a), A notice of the peculiar mode of the occurrence of gold and silver in the foothills of the Sierra Nevada, and especially at Whiskey Hill, in Placer County, and Quail Hill, in Calaveras County, California: California Academy of Natural Sciences Proceedings: 3: 349-351; […American Journal of Science, 2nd. series: 45: 92-95 (1868)]: .

Fairbanks, Harold W. (1890), Geology of the Mother Lode region: California Mining Bureau. (Report 10): 10: 23-90.

Watts, Wm. L. (1893), Alameda, Colusa, Del Norte, Fresno, Glenn, Humboldt, Marin, Mendocino, Merced, Placer, Sacramento, Santa Clara, San Joaquin, Sonoma, Stanislaus, Sutter, Kern, Lake, Contra Costa, Tehama, Tulare Counties California Mining Bureau. (Report 11): 11: 121-138, 179-199, 210-240, 249-258, 319-322, 334-336, 374-375, 394, 453-479, 485-492.

Turner, Henry Ward (1894a), Description of the gold belt; description of the Jackson sheet: USGS, Geol. Atlas Jackson folio (Folio No. 11), 6pp. (reprinted 1914).

Lindgren, Waldemar (1894b), Description of the gold belt; description of the Sacramento sheet. USGS Geologic Atlas, Sacramento folio (Folio No. 5), 3 pp.

Lindgren, Waldemar (1897), Description of the gold belt; description of the Truckee sheet: USGS Geological Atlas, Truckee folio (Folio No. 39), 8 pp.

Lindgren, Waldemar (1900), Description of the Colfax sheet, California: USGS Geological Atlas, Colfax folio (Folio No. 66), 10 pp.

Reid, John A. (1907a), The country east of the Mother Lode (in Placer County, California): Mining and Scientific Press: 94: 279-280.

Lindgren, Waldemar (1911), The Tertiary gravels of the Sierra Nevada of California: USGS Professional Paper 73, 226 pp.

Tucker, W. Burling, and Waring, C.A. (1916), Mines and mineral resources of El Dorado, Placer, Sacramento, and Yuba counties: California State Mining Bureau, 15th Report of the State Mineralogist (Report 15): 283-299.

Waring, Clarence A. (1917), Placer County: Report 15 of the State Mineralogist, California State Mining Bureau (Report 15): 15: 344.

Waring, Clarence A. (1919), Butte, Placer, Sacramento, Yuba Counties: California Bureau of Mines (Report 15): 15: 309-459.

Waring, Clarence A. (1919), Placer County, drift and hydraulic mines: California Mining Bureau (Report 15): 15: 352-379.

Hamilton, Fletcher McNab (1920), Placer County: California State Mining Bureau 17th Report of the State Mineralogist: 442-451.

Logan, Clarence August (1921), Placer County: California State Mining Bureau. (Report 17): 17:

Haley, C.S. (1923) Gold placers of California. California Mining Bureau. Bulletin 92, 167 pp.

Logan, Clarence August (1927), Amador County, Placer County: California Mining Bureau. (Report 23): 23: 131-202, 235-286.

Jenkins, O. P. (1932), Geologic map of the northern Sierra Nevada, showing Tertiary river channels and Mother Lode belt: California Division of Mines 28th Report of the State Mineralogist, p. 279-298.

Logan, Clarence August (1934), Mother Lode Gold Belt of California: California Division Mines Bulletin 108, 221 pp.: Pl. II.

Logan, Clarence August (1936), Gold mines of Placer County: California Journal of Mines and Geology, California Division Mines (Report 32): 32(1): 7-96).

Logan, Clarence August (1941), Mineral resources of Nevada County, California: California Division Mines (Report 37): 37: 374-408; […California Journal of Mines and Geology: 37(3): 378-379.

Eric, J.C. (1948), Tabulation of Copper Deposits in California in: Copper in California: California Division of Mines Bulletin 144: 197-387.

Logan, Clarence August (1948), History of mining and milling methods in California, in Jenkins, O.P. and others, editors, Geologic guidebook along highway 49 - Sierran gold belt - The Mother Lode Country: California Division of Mines Bulletin 141.

Anonymous (1950), New tungsten find in Placer Co.: California Division of Mines, Mineral Information Service: 3(11): 2.

Rynearson, Garn Arthur (1953), Geological investigations of chromite in California: Chromite deposits in the northern Sierra Nevada, California. California Division of Mines and Geology Bulletin 134, part 3 chapter 5: 229, Pl. 13.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines (Report 53): 53(3&4): 353-724.

Chandra, D. K. (1961) Geology and mineral deposits of the Colfax and Foresthill quadrangles, California. Special Report 67, California Division of Mines, 50 pp.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282, 320.

Merwin, R. W. (1968), Gold resources in the Tertiary gravels of California: U.S. Bureau of Mines Technical Progress Report 3, 14 pp.

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193.

Mineralogical Record (2000): 31: 19.

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