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Green Mountain Boy mine, Hartville District, Platte Co., Wyoming, USA

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Latitude & Longitude (WGS84): 42° 16' 33'' North , 104° 43' 27'' West
Latitude & Longitude (decimal): 42.27604,-104.72421
GeoHash:G#: 9xt88bn5v
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Rocks & Minerals 76:392

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: USGS Bull 315
Chalcocite
Formula: Cu2S
Reference: USGS Bull 315
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: USGS Bull 315
'Flint'
Reference: USGS Bull 315
Malachite
Formula: Cu2(CO3)(OH)2
Reference: USGS Bull 315

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcocite'2.BA.05Cu2S
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Malachite'5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
'Chrysocolla'9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Flint'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Flint'-

List of minerals for each chemical element

HHydrogen
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H MalachiteCu2(CO3)(OH)2
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O CalciteCaCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O MalachiteCu2(CO3)(OH)2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SSulfur
S ChalcociteCu2S
CaCalcium
Ca CalciteCaCO3
CuCopper
Cu ChalcociteCu2S
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu MalachiteCu2(CO3)(OH)2

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

Paleocene
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]

Pennsylvanian
298.9 - 323.2 Ma



ID: 3279999
Divisions 4 and 5, Hartville Formation

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Hartville Formation

Description: Interbedded maroon, pink, and gray siltstone and claystone; gray, brown and buff limestone; pink dolomite; and thin gray sandstone beds. Forms smooth slopes with limestone ledges; thickness 0 to 250 feet (0 to 76 m)

Comments: The Hartvile Formation is subdivided into six informal divisions, numbered from 1 (stratigraphically highest) to 6 (stratigraphically lowest). Some divisions are combined for ease in mapping

Reference: McLaughlin, J.F., and R.E. Harris. Geologic Map Of The Torrington 30’ X 60’ Quadrangle, Goshen And Platte Counties, Wyoming, And Scotts Bluff And Sioux Counties, Nebraska. Wyoming State Geological Survey Open File Report 04-11. [175]

Mississippian - Late Devonian
323.2 - 382.7 Ma



ID: 2922002
Guernsey Formation

Age: Paleozoic (323.2 - 382.7 Ma)

Stratigraphic Name: Guernsey Formation

Description: Blue-gray massive cherty limestone and dolomite. Locally includes unnamed dolomite and sandstone of Devonian and Cambrian(?) age.

Lithology: Major:{limestone,dolostone}

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License


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