RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

Sketch map

Diamond Alkali Co., No. 1 (Prospect)State Highway Dept (Producer)Phillips Petroleum, Cedar Mtn. No. 1 (Prospect)Yenke (Occurrence)Westvaco Well No. 6 + 3 more nearby (Prospect)Union Pacific Well No. 4 + 2 more nearby (Prospect)Granger No. 2 drill hole (Prospect)Spirit, Uinta, Indian, Paintpot + 2 more nearby (Occurrence)Westvaco Well No. 10 + 4 more nearby (Prospect)Westvaco Mine and Plant (FMC) + 11 more nearby (Producer)Solvay (Producer)Diamond Alkali Co., Finley No. 2 (Prospect)OCI + 1 more nearby (Producer)State Highway Dept + 1 more nearby (Producer)Potash Company of America Well No. 2 (Prospect)Diamond Alkali Co., Sturm No. 1 (Prospect)Perkins No. 2 (drill hole) (Prospect)Unknown-No. 1 (Occurrence)Big Island No. 12 drill hole (Stauffer Chem Co,) + 1 more nearby (Prospect)Diamond Alkali Co., Butler Well No. 1 + 1 more nearby (Prospect)Diamond Alkali Co., No. 3 (Prospect)State Highway Department Gravel Pit (Producer)Perkins No. 1 (drill hole) (Prospect)Western Alkali Company wells (Past Producer)Anomaly No. B-16-2 + 2 more nearby (Occurrence)State Highway Dept (Producer)Little Mountain (Unknown)Pilot Butte (Prospect)State Highway Department Gravel Pit (Producer)Sage Creek (Unknown)Boar's Tusk (Prospect)Pedro Claims (Prospect)Red Creek + 1 more nearby (Occurrence)Unknown (east of Boar's Tusk) + 1 more nearby (Prospect)Hopefull (Occurrence)Rock Springs Phos-Acid Plant (Facility) (Plant)Aspen Mountain (Occurrence)North Table Mountain + 1 more nearby (Prospect)Cross Mesa (Prospect)Murphy No. 1 Claim + 1 more nearby (Occurrence)Star Nos. 5 and 6 (Prospect)Steamboat Mountain (Prospect)Hatcher Mesa + 3 more nearby (Prospect)Emmon's Cone + 1 more nearby (Prospect)Superior (Occurrence)Murphy No. 2 Claim (Occurrence)Pine Claim (Unknown)South Table Mountain (Prospect)Spring Butte (Occurrence)Zirkel Mesa (Prospect)Mud No. 1 and No. 2 Claims (Occurrence)Union Pacific No. 2 + 1 more nearby (Occurrence)Zalenka (Occurrence)Black Butte Creek + 1 more nearby (Occurrence)Pine Mountain area (Prospect)Merrimac (Occurrence)Black Rock Mesa (Prospect)Sand Rock Claims (Prospect)Yellow Rose #2 + 2 more nearby (Occurrence)State Highway Dept (Producer)Unknown (Alkali Basin Area) (Occurrence)Big T (Occurrence)John Group Claim (Prospect)Jabcig (Unknown)Unknown (Black Rock Creek area) (Prospect)Washakie Basin: Washakie Fm (Occurrence)Sweetwater (Occurrence)Antelope (Prospect)Minnie Mccormick and Associates + 2 more nearby (Occurrence)Sandy No. 2 + 1 more nearby (Prospect)Lone Wolf + 2 more nearby (Past Producer)Sourdough Gulch + 1 more nearby (Prospect)State Highway Dept (Producer)ENQ (Prospect)State School #1 (Past Producer)Sourdough Butte (Prospect)Wycal (Unknown)Lost Creek In-Situ Recovery Project (Producer)Sweetwater Mill and Mine (Past Producer)Five Mile Ditch (Unknown)Iris + 1 more nearby (Unknown)Gamma Ray (Unknown)Cox (Prospect)State School No. 2 (Prospect)Yore No. 23 (Prospect)Continental Divide (Prospect)Sandy No. 1 + 3 more nearby (Unknown)Bab + 3 more nearby (Unknown)Lost Soldier (Prospect)Wasatch Claims (Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
90 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Aspen Mountain

We picked it because its USGS record mentions 1 gem or collectible mineral (Quartz) and 1 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Aluminum. Minerals mentioned: Quartz. Approx. location 41.426, -109.106. USGS record.

Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.

Field cards: what kind of sites?

69
Prospect

Explored or test-dug, with no recorded production.

29
Occurrence

The mineral was noted here, without development.

20
Unknown

Status not recorded.

18
Producer

Was producing when the record was made.

6
Past Producer

Produced ore or material at some point in the past.

1
Plant

A processing plant site.

Status terms come from USGS MRDS records.

Mineral cards

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

Minerals recorded here

Trona 36Leucite 14Uranophane 2Halite 2Schrockingerite 1Alunite 1Kaolinite 1Clinoptilolite 1Oil Shale 1Uraninite 1Coffinite 1Autunite 1

Commodities

Uranium 60Sodium 32Potassium 19Potash 17Sodium Carbonate 12Silica 10Soda Ash 6Sodium Sulfate 3Titanium-Heavy Minerals 2Phosphorus-Phosphates 2

Sites (first 40)

SiteCommodityMinerals recordedStatusApprox. location
Aspen MountainAluminumAlunite, KaoliniteOccurrence41.426, -109.106
SweetwaterZeolitesClinoptiloliteOccurrence41.182, -108.202
Endlich and Hague HillsPotassium, PotashLeuciteProspect41.892, -109.004
Table MountainPotassium, PotashLeuciteProspect41.904, -109.008
Boar's TuskPotassium, PotashLeuciteProspect41.963, -109.197
Zirkel MesaPotassium, PotashLeuciteProspect41.786, -108.913
Mathews HillPotassium, PotashLeuciteProspect41.951, -109.188
Pilot ButtePotassium, PotashLeuciteProspect41.644, -109.344
Hallock, Iddings and Weed ButtesPotassium, PotashLeuciteProspect41.882, -108.999
Hatcher MesaPotassium, PotashLeuciteProspect41.836, -108.966
Emmon's ConePotassium, PotashLeuciteProspect41.824, -108.949
Osborn MesaPotassium, PotashLeuciteProspect41.816, -109.006
Badgers TeethPotassium, PotashLeuciteProspect41.811, -109.585
South Table MountainPotassium, PotashLeuciteProspect41.907, -108.908
North Table MountainPotassium, PotashLeuciteProspect41.918, -109.021
Cross MesaPotassium, PotashLeuciteProspect41.836, -109.062
Lost Creek shroeckingerite depositUraniumSchrockingeriteOccurrence42.189, -108.101
Marston Shaft No 1SodiumTronaProspect41.637, -109.817
Granger No. 2 drill holeSodiumTronaProspect41.511, -109.914
Westvaco Well No. 12SodiumTronaProspect41.651, -109.776
Diamond Alkali Co., Sturm No. 1SodiumTronaProspect41.469, -109.703
Union Pacific Well No. 1SodiumTronaProspect41.566, -109.817
Westvaco Well No. 11SodiumTronaProspect41.651, -109.779
Westvaco Well No. 7SodiumTronaProspect41.610, -109.759
Union Pacific Well No. 2SodiumTronaProspect41.622, -109.824
John Hay, Jr., Well No. 1Sodium CarbonateTronaProspect41.572, -109.800
Diamond Alkali Co., No. 3SodiumTronaProspect41.540, -109.627
Westvaco Well No. 1SodiumTronaProspect41.602, -109.791
Perkins No. 1 (drill hole)SodiumTronaProspect41.239, -109.607
Westvaco Well No. 5SodiumTronaProspect41.637, -109.836
Westvaco Well No. 13SodiumTronaProspect41.651, -109.772
Westvaco Well No. 4SodiumTronaProspect41.595, -109.836
Green River trona depositSodium, Soda Ash, Sodium CarbonateTronaProducer41.594, -109.800
Westvaco Mine and Plant (FMC)Soda Ash, Sodium CarbonateTronaProducer41.620, -109.810
General Chemical Corp. Trona Mine and PlantSoda Ash, Sodium CarbonateTronaProducer41.592, -109.755
Potash Company of America Well No. 1SodiumTronaProspect41.566, -109.759
Diamond Alkali Co., Finley No. 2SodiumTronaProspect41.338, -109.773
Perkins No. 2 (drill hole)SodiumTronaProspect41.239, -109.722
Westvaco Well No. 6SodiumTronaProspect41.637, -109.836
Westvaco Well No. 3SodiumTronaProspect41.621, -109.811

Fossil collections

The Paleobiology Database lists 421 fossil collection records in Sweetwater County. These are research records, not public dig sites.

Nearby counties

Uinta County · Sublette County · Fremont County · Lincoln County · Carbon County

Wyoming mineral guides

Back to all Wyoming counties.

Related articles

How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.

Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.

Updated