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Apex Mine (Dixie Mine; Utah-Eastern Mine; Dixie-Apex; Pen), Jarvis Peak, Tutsagubet District, Beaver Dam Mts, Washington Co., Utah, USA

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Latitude & Longitude (WGS84): 37° 4' 10'' North , 113° 48' 13'' West
Latitude & Longitude (decimal): 37.06944,-113.80361
Köppen climate type:BSk : Cold semi-arid (steppe) climate

Ore mined primarily for it's gallium and germanium content.

Mineral List

30 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

Virgilian - Morrowan
298.9 - 323.2 Ma

ID: 2184171
Callville Limestone

Age: Pennsylvanian (298.9 - 323.2 Ma)

Description: Medium-gray, fine- to medium- grained, medium- to thick-bedded limestone with cyclic interbeds of moderate-orange-pink calcareous siltstone, sandstone, and light-gray dolomite increasing in the upper third; commonly cherty and fossiliferous; Chaetetes coral is common in the upper part, whereas brachiopods and bryozoans are common in limestone beds throughout (Hintze, 1986); forms ledge-slope topography in the Beaver Dam Mountains and at Square Top Mountain, similar to the overlying Pakoon Dolomite; stratigraphically equivalent to the lower part of the Bird Spring Formation of southeast Nevada (Hintze and Axen, 1995); upper contact is placed at the base of the lighter- colored, non-fossiliferous dolomite beds of the Pakoon Dolomite; represents shallow-marine deposits (Welsh and Bissell, 1979); age from Welsh and Bissell (1979); about 1500 to 2000 feet (460–600 m) thick in the Beaver Dam and southern Bull Valley Mountains (Hammond, 1991; Hintze and Hammond, 1994; Hintze and others, 1994).

Comments: shallow marine

Lithology: Limestone, dolomite, siltstone, sandstone

Reference: Biek, R.F, P.D. Rowley, D.B. Hacker, J.M. Hayden et al. Geologic map of the St. George and East Part of the Clover Mountains Quadrangles, Wasington, and Iron Cos, UT. Utah Geological Survey Map 242DM. [32]

298.9 - 323.2 Ma

ID: 2743044
Callville Limestone

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Callville Limestone

Lithology: Major:{limestone,dolostone,sandstone}

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.


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Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124pp.: 543.
MacFall, 1951. Gem Hunter's Guide, 1st ed.
Bernstein, L.R. (1986) Geology and mineralogy of the Apex germanium-gallium mine, Washington County, Utah. USGS Bulletin 1577.
UGMS Minerals and Mineral Localities of Utah, Bulletin 117.

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