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Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA

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Latitude & Longitude (WGS84): 38° 49' 31'' North , 122° 20' 20'' West
Latitude & Longitude (decimal): 38.82528,-122.33889

A former Hg mine located in secs. 6 & 7, T11N, R4W, MDM, 0.3 km (900 feet) S of Knoxville, close to the Lake County line.

NOTE: Dana 6: 63 places this mine in Lake Co., which is in error.

Mineralization is a Hg deposit which lies on the Knoxville Fault at a contact of serpentine, shale and sandstone in the lower part of the Great Valley sequence.

Mineral List

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

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Late Jurassic - Middle Jurassic
145 - 174.1 Ma
Ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains)

Age: Jurassic (145 - 174.1 Ma)

Stratigraphic Name: Josephine Peridotite

Description: Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3

Comments: Coast Range ophiolite, Josephine ophiolite. Ultramafic rocks in Middle to Late Jurassic ophiolites of Coast Ranges and westernmost Klamath Mts.

Lithology: Major:{serpentinite}, Minor:{peridotite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

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.


Durand, F.E. (1873), Note on crystals of quartz of a red color by the interposition of cinnabar: California Academy of Science Proceedings: 4: 211.

Durand, F.E. (1873), Description of a new mineral from the New Almaden mine: California Academy of Science Proceedings: 4: 218.

Durand, F.E. (1873), Notes on the crystallization of metacinnabarite: California Academy of Science Proceedings: 4: 219-220.

Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 261, 289.

Becker, George F. (1888b), Geology of the quicksilver deposits of the Pacific slope: USGS Monograph 13, atlas: 274, 285-289, 389, 486.

Friedrich, James J. (1888), Stalactitic melanterite and other minerals from California: New York Academy of Science Transactions: 8: 22.

Melville, William Harlow & Waldemar Lindgren (1890), Contributions to the mineralogy of the Pacific coast: USGS Bulletin 61, 40pp.: 23, 24.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 63, 966, 1096.

Eakle, Arthur Starr (1901), Mineralogical notes; with chemical analyses by W.T. Schaller: University of California, Department of Geological Science Bulletin: 2: 322.

Eakle, Arthur Starr (1903a), Palacheite: University of California, Department of Geological Science Bulletin: 3: 231-236.

Eakle, Arthur Starr (1903b), Note on the identity of palacheite and botryogen: American Journal of Science, 4th. Series: 16: 379-380.

Hanks, Henry Garber (1905), Notes on “aragotite,” a rare California mineral: Royal Micr. Soc. Jour., 1905: 673-676.

Kramm, H.E. (1910), Serpentines of the central Coast Ranges of California: American Philosophical Society Proceedings: 49: 315-349; […(abstract): Science, new series: 32: 31 (1910); …Geological Society of America Bulletin: 21: 793 (1910)]: 345.

Bradley, W.W. (1918), Quicksilver resources of California, with a section on metallurgy and ore dressing: California Mining Bureau. Bulletin 78, 389 pp.: 86.

Rogers, Austin Flint (1931b), Castanite, a basic ferric sulphate from Knoxville, California: American Mineralogist: 16: 396-404.

Bandy, Mark C. (1932), Castanite from Chuquicamata, Chile: American Mineralogist: 17: 534-537.

Ransome, Alfred Leslie & J.L. Kellogg (1939), Quicksilver resources of California: California Journal of Mines and Geology, California Division Mines (Report 35): 35: 410.

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: 78-81, 88.

Whitmore, D.R.E., et al (1946), Chrome micas: American Mineralogist: 31: 21.

Rocks & Minerals (1947): 22: 615.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 216, 465, 529, 614, 618.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 83, 97, 112, 119, 149, 156, 159, 165, 178, 186, 220, 247, 254-255, 258, 262, 267, 304, 314, 350, 382.

Gamble, G.F. (1982), Present owner of the Knoxville Mine (oral communications)

Guinivere, R. (1982), VP, Engineering, Homestake Mining Co., San Francisco, California (Oral communications) [ to whom ??]

Homestake Mining Company and D'Appoloria (1982), McLaughlin project - Proposed Gold Mine and Mineral Extraction Facility: Project Description and Environmental Assessment: 3-19.

Vredenburgh,L.M. (1982), Tertiary Gold-bearing Mercury Deposits of the Coast Ranges of California: California Geology: 35(2): 23.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 74, 118, 130, 197, 264, 266, 271, 273, 275, 278,

Encyclopedia of Minerals, 2nd. edition: 134.

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