Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
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
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Willow Creek Uranium Mine, Johnson Co., Wyoming, USAi
Regional Level Types
Willow Creek Uranium MineMine
Johnson Co.County

This page is currently not sponsored. Contact us for sponsorship opportunities.
Lock Map
Latitude & Longitude (WGS84): 43° 48' 16'' North , 106° 2' 18'' West
Latitude & Longitude (decimal): 43.80472,-106.03861
GeoHash:G#: 9xu95n3j1
Owned/operated by:Uranium One (100%) (100%) - a subsidiary of Rosatom State Atomic Energy Corporation
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
Edgerton201 (2017)46.7km
Midwest410 (2017)47.8km

The Willow Creek Mine is an ISR uranium mine located in Johnson and Campbell Counties in Wyoming's Powder River Basin, approximately 105 km north of the City of Casper, Wyoming. The Willow Creek Mine includes the Irigaray ISR central processing plant, the Christensen Ranch satellite ISR facility and associated uranium ore bodies. Mining operations at Willow Creek date back to the late 1970s.

Regions containing this locality

North America PlateTectonic Plate

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

No minerals currently recorded for this locality.

List of minerals for each chemical element

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 Macrostrat.org

33.9 - 56 Ma

ID: 2841315
Wasatch Formation

Age: Eocene (33.9 - 56 Ma)

Stratigraphic Name: Wasatch Formation

Description: (Thrust Belt) Main body--Variegated red to gray, brown, and gray mudstone and sandstone; conglomeratic lenses. (in southwest Wyoming) - Drab to variegated claystone and siltstone, carbonaceous shale and coal, buff sandstone, arkose, and conglomerate. In northwestern part of Green River Basin is thick arkosic light-yellowish-tan sandstone intertonguing with pale-green to gray claystone and shale. (in east Wyoming) - Drab sandstone and drab to variegated claystone; numerous coal beds in lower part.

Comments: Original map source: Green, Gregory N., and Drouillard, Patricia H., 1994, The Digital Geologic Map of Wyoming in ARC/INFO Format: U.S. Geological Survey Open-File Report 94-0425, scale 1:500,000.

Lithology: Major:{mudstone,sandstone}, Minor:{conglomerate,claystone,siltstone,shale,coal, arkose}

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]

Eocene - Paleocene
33.9 - 66 Ma

ID: 3347812
Wasatch Formation

Age: Paleogene (33.9 - 66 Ma)

Stratigraphic Name: Wasatch Formation

Description: Lenticular interbeds of gray to light-brown, fine- to coarse-graine, locally conglomeratic, feldspathic to arkosic, crossbedded sandstone; dark- to light-gray or brownor greenish-gray shale, claystone, and siltstone. Subbituminous and lignitic coal beds and carbonaceous shales occur locally. Thickness of over 2400 feet (description based on Kohout, 1957)

Reference: Ver Ploeg, A.J., C.S. Boyd and J.M. Mulbay. Geologic map of the Kaycee 30' x 60' quadrangle, Johnson, and Campbell counties, Wyoming. Wyoming State Geological Survey Map Series 63. [196]

56 - 66 Ma

ID: 3193162
Cenozoic sedimentary rocks

Age: Paleocene (56 - 66 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

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

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 22, 2019 21:32:30 Page generated: February 5, 2019 16:23:15
Go to top of page