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Bleak House Mine, Gilman, Gilman District (Battle Mountain District; Red Cliff District), Eagle Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 31' 59'' North , 106° 23' 50'' West
Latitude & Longitude (decimal): 39.53306,-106.39725
GeoHash:G#: 9xh2fugbu
Locality type:Mine
Köppen climate type:Dfc : Subarctic climate

Ref: Rocks & Min. 78:5:298-323

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,039 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

5 valid minerals.

Detailed Mineral List:

Formula: PbS
Reference: Rocks & Min. 78:5:298-323
Galena var: Argentiferous Galena
Formula: PbS
Reference: Rocks & Min. 78:5:298-323
Formula: FeS2
Reference: Minerals of Colorado (1997) E.B. Eckel
Formula: FeS2
Reference: Rocks & Min. 78:5:298-323
Formula: FeCO3
Reference: Rocks & Min. 78:5:298-323
Formula: ZnS
Reference: Rocks & Min. 78:5:298-323
Sphalerite var: Marmatite
Formula: (Zn,Fe)S
Reference: Rocks & Min. 78:5:298-323

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
var: Argentiferous Galena2.CD.10PbS
var: Marmatite2.CB.05a(Zn,Fe)S
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:2
Unclassified Minerals, Rocks, etc.
var: Argentiferous Galena
var: Marmatite

List of minerals for each chemical element

C SideriteFeCO3
O SideriteFeCO3
S Galena (var: Argentiferous Galena)PbS
S GalenaPbS
S MarcasiteFeS2
S Sphalerite (var: Marmatite)(Zn,Fe)S
S PyriteFeS2
S SphaleriteZnS
Fe MarcasiteFeS2
Fe Sphalerite (var: Marmatite)(Zn,Fe)S
Fe PyriteFeS2
Fe SideriteFeCO3
Zn Sphalerite (var: Marmatite)(Zn,Fe)S
Zn SphaleriteZnS
Pb Galena (var: Argentiferous Galena)PbS
Pb GalenaPbS

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

Permian - Devonian
251.902 - 419.2 Ma

ID: 3187583
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 419.2 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]

Mississippian - Cambrian
323.2 - 541 Ma

ID: 2899970
Leadville Limestone, Williams Canyon Limestone , Manitou Limestone, and Sawatch Quartzite

Age: Paleozoic (323.2 - 541 Ma)

Stratigraphic Name: Leadville Limestone; Williams Canyon Limestone ; Manitou Limestone; Sawatch Quartzite

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{limestone}, Minor:{quartzite}

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

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