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Napa Co., California, USA

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 38° 49' 31'' North , 122° 20' 20'' West (est.)
Margin of Error:~0km

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Mineral List

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

74 valid minerals. 2 (TL) - type locality of valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

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

Localities in this Region


The above list 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.


Palmer, Lyman, L. (1881), History of Napa and Lake Counties, 291 pp., San Francisco, Slocum, Bowen and Co.

Goodyear, Watson Andrews (1890), Alameda, Colusa, Contra Costa, Lake, Marin, Mendocino, Napa, Yolo Counties: California Mining Bureau. Report 10: 91-95, 153-164, 165, 227-271, 299, 314, 322, 349-363, 793-794.

Fairbanks, Harold W. (1893a), Notes on the geology and mineralogy of portions of Tehama, Colusa, Lake, and Napa Counties: California Mining Bureau. Report 11: 54-75.

Bradley, W.W. (1916a), Colusa, Glenn, Lake, Marin, Napa, Solano, Sonoma, Yolo County: California Mining Bureau. Report 14: 175-370.

Boalich, E. S. (1921), Mendocino, Monterey, Mono, Napa, Solano, Stanislaus Counties: California Mining Bureau. Report 17: 144-161, 242-247, 253-255.

Averill, Charles V. (1929), Redding field division, Lassen and Modoc, Napa, Lake, Glenn, Mendocino Counties: California Journal of Mines and Geology, California Division Mines (Report 25): 25: 2-19, 213-242, 337-365, 418-426, 456-467.

Averitt, Paul (1945), Quicksilver deposits of the Knoxville district, Napa, Yolo, and Lake Counties, California: California Journal of Mines & Geology, California Division Mines (Report 42): 42: 65-90.

Dow, D.H. & T.P. Thayer (1946), Chromite deposits of the northern Coast Ranges of California: California Division Mines Bulletin 134, part 2, chapter 1.

Yates, Robert G. & Lowell S. Hilpert (1946), Quicksilver deposits of eastern Mayacmas district, Lake and Napa Counties, California: California Journal of Mines and Geology, California Division of Mines (Report 42): 42: 231-286.

Davis, Fenelon Francis (1948), Mines and mineral resources of Napa County, California: California Division Mines Report 44: 159-188.

Fix, A.A. & C.M. Swinney (1949), Quicksilver deposits of the Oakville district, Napa County, California: California Journal of Mines and Geology: 45: 31-46.

Weaver, C.E. (1949), Geology and Mineral Deposits of an Area North of San Francisco Bay, California: California Division of Mines Bulletin 149.

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

Clark, 1993 - "Hey's Mineral Index, 3rd. edition."

Hasenmueller, E. A., & Bish, D. L. (2005). The hydration and dehydration of hydrous ferric iron sulfates. In 36th Annual Lunar and Planetary Science Conference (Vol. 36, March).

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