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Swede Boy mine, Deer Creek District, Converse Co., Wyoming, USAi
Regional Level Types
Swede Boy mineMine
Deer Creek DistrictMining District
Converse Co.County

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Latitude & Longitude (WGS84): 42° 38' 48'' North , 105° 58' 21'' West
Latitude & Longitude (decimal): 42.64686,-105.97253
GeoHash:G#: 9xsdse95v
USGS MRDS Record:10303666
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
Glenrock2,598 (2017)25.2km
Meadow Acres198 (2011)25.4km
Rolling Hills442 (2017)30.3km
Casper Mountain401 (2011)30.5km
Brookhurst185 (2011)31.8km

No description has been added for this locality. Can you add one?

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

Late Miocene
5.333 - 11.62 Ma

ID: 2850376
Upper Miocene Rocks

Age: Miocene (5.333 - 11.62 Ma)

Description: Southwest Wyoming: South end of Wind River Range--Siliceous, arkosic, and locally radioactive sandstone, claystone, and conglomerate. Fission-track age about 27 Ma. Recent work suggests that part of these deposits may be of Eocene age. Pliocene and Miocene (as originally defined 2) South Pass Formation. Saratoga Valley--White to greenish-gray tuffaceous sandstone, siltstone, and claystone; locally conglomeratic. North Park Formation; Central Wyoming: Arkosic sandstone, conglomerate, and siltstone; some light-colored tuffaceous radioactive claystone and white cherty limestone. North of Sweetwater River in Granite Mountains--Light-colored tuffaceous radioactive claystone, siltstone, sandstone, and arkose. Moonstone Formation; East Wyoming: Light-colored tuffaceous claystone, sandstone, and conglomerate. Ogallala Formation in Denver Basin.

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:{sandstone,claystone,conglomerate}, Minor:{siltstone,volcanic,limestone}

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]

Late Miocene
5.333 - 11.62 Ma

ID: 3219482
Ogallala Formation

Age: Miocene (5.333 - 11.62 Ma)

Stratigraphic Name: Ogallala Formation

Description: Fine- to coarse-grained, light- to greenish-, yellowish-, and orange-gray sandstone interbedded and interfingered in the upper part with conglomerate, claystone, and freshwater limestone; white to dark-gray vitric tuff beds near the top. Lower part has hard "pipy" calcareous sandstone concretions. Thickness 0 to 400 feet (0 to 122 m)

Reference: McLaughlin, J.F. and A.J. Ver Ploeg. Geologic Map Of The Douglas 30' X 60' Quadrangle, Converse And Platte Counties, Wyoming. Wyoming State Geological Survey Map Series 83. [158]

2500 - 4000 Ma

ID: 3191696
Archean crystalline metamorphic rocks

Age: Archean (2500 - 4000 Ma)

Lithology: Orthogneiss/paragneiss

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, used under Creative Commons Attribution 4.0 License


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