Donate now to keep alive!Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Corkscrew Canyon Mine (Corkscrew Mine), Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 36° 22' 40'' North , 116° 45' 36'' West
Latitude & Longitude (decimal): 36.37778,-116.76000
Other regions containing this locality:Death Valley National Park, California/Nevada, USA
Köppen climate type:BWh : Hot deserts climate

A former borate mine located in the center N½ sec. 21, T26N, R2E, SBM, 10.1 km (6.3 miles) NW of Ryan, in Furnace Creek Wash at the mouth of Corkscrew Canyon, E flank of the Black Mountains, on National Park Service wilderness land (Death Valley National Park/Death Valley Wilderness). Owned by the U.S. Borax and Chemical Co. (1976). MRDS database stated accuracy for this location is 1,000 meters.

The entrance to this site is through a locked gate east on Route 190 about 1-1/4 miles beyond the exit road from Twenty-Mule-Team Canyon. Mine workings found here alongside a wash consisted of several adits, a huge wooden four-chute ore bin, and an adjacent platform loading area. Activity here was all underground.Greene, 1981

Mineralization is a Miocene borate deposit (Mineral occurrence model information: Model code: 260; USGS model code 35b.3; Deposit model name: lacustrine borates), hosted in rocks of the Furnace Creek Formation (mudstone, shale, sandstone, limestone). The ore body is 548.64 meters long and has a depth-to-top of 0.0 meters. The borate-bearing zone is about 1,800 feet long. The colemanite is massive and cavernous. Basalt occurs in the footwall; tuffaceous mudstone and sandstone occur in the hanging wall. Local rocks include Tertiary nonmarine rocks, undivided.

Workings include unspecified underground workings.

Reserve-Resource data are found in: Evans, James R., G.C. Taylor, and J.S. Rapp (1976).

Reserves and resources data: Type: in-situ: Estimate year: 1976; total resources: 172,000 metric tons of ore.

Assay results: B2O3: 31 weight per cent B (1976). 50% of these reserves were considered to be recoverable.

Mineral List

11 valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

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

Pliocene - Paleocene
2.588 - 66 Ma

ID: 2826177
Tertiary nonmarine rocks, undivided

Age: Cenozoic (2.588 - 66 Ma)

Stratigraphic Name: Avawatz Formation; Bealville Fanglomerate; Caliente Formation (part); Goler Formation; Old Woman Sandstone; Titus Canyon Formation; Violin Breccia; Walker Formation; Witnet Formation

Description: Undivided Tertiary sandstone, shale, conglomerate, breccia, and ancient lake deposits.

Lithology: Major:{sandstone,conglomerate}, Incidental:{sedimentary breccia, volcanic, mudstone, limestone, siltstone}

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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller, Waldemar Theodore (1916b), Inyoite and meyerhofferite, two new calcium borates: USGS Bulletin 610: 35.
Christ, C.L. & J.R. Clark (1960), X-ray crystallography and crystal chemistry of gowerite, CaO-3B2O3-5H2O: American Mineralogist: 45: 230-234.
Erd, R.C., J.F. McAllister & A.C. Vlisidis (1961), Nobleite, another new hydrous calcium borate from the Death Valley region, California: American Mineralogist: 46: 560-571.
McAllister, James Franklin (1961), Sborgite in the Furnace Creek area, California: USGS PP 424-B, Article 129: B299-B301.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 228, 280.
Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 350.
McAllister, James Franklin (1970) Geology of the Furnace Creek borate area, Death Valley, Inyo County, California. California Division of Mines and Geology Map Sheet 14, 9 pp.: 9.
Konnert, J.A., Clark, J.R., and Christ, C.L. (1972) Gowerite, CaB5O8(OH) •B(OH)3•3H2O: crystal structure and comparison with related borates. American Mineralogist: 57: 381-396.
Muehle, G. (1974): Colemanite pseudomorphs from the Corkscrew mine, Death Valley, California. Mineralogical Record 5, 174-177.
Evans, James R., G.C. Taylor, and J.S. Rapp (1976) Mines and mineral deposits in Death Valley National Monument. California Division Mines and Geology Special Report 125: 1-61: 28.
Greene, Linda I. (1981), U.S. National Park Service, Historic Preservation Branch, Pacific Northwest/Western Team, Denver Service Center, Death Valley – Historic Resource Study – A History of Mining, Volume I (Parts 1 and 2): part 2: III. E.2.b)(23).
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238, 246, 252.
Orris, G. (1990) estimate of ore reserves based on published data in 1990.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10023434 & 10212511.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060271264.

External Links

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 17, 2018 09:12:02 Page generated: December 21, 2017 04:35:21
Go to top of page