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Boundary Red Mountain Mine (Red Mountain Mine; Boundary Mountain Mine), Mount Larrabee, Mount Baker District, Whatcom Co., Washington, USAi
Regional Level Types
Boundary Red Mountain Mine (Red Mountain Mine; Boundary Mountain Mine)Mine
Mount LarrabeeMountain
Mount Baker DistrictMining District
Whatcom Co.County

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Lock Map
Latitude & Longitude (WGS84): 48° 59' 42'' North , 121° 37' 49'' West
Latitude & Longitude (decimal): 48.99500,-121.63028
GeoHash:G#: c29w8pr89
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate

This mine is 8 miles north of Twin Lakes. it produced ore in 1912-1917, 1920-1922, 1925, 1929-1930, 1935-1942, and 1947. The geology is faults and fractures in the contact zone between the Chilliwack Group and the Slesse Diorite of the Chilliwack Batholith
Ref:Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

8 valid minerals.

Detailed Mineral List:

Formula: CaCO3
Formula: CuFeS2
Reference: Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis
Formula: Au
Reference: Minerals of Washington, Bart Cannon 1975
Formula: FeS2
Reference: Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis
Formula: Fe7S8
Reference: Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis
Formula: SiO2
Reference: Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis
Formula: Ag
Formula: Bi2Te3
Reference: Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Metals, other than the Platinum Group
Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:1
AmBnXp, with (m+n):p = 2:3
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si

List of minerals for each chemical element

C CalciteCaCO3
O CalciteCaCO3
O QuartzSiO2
Si QuartzSiO2
S ChalcopyriteCuFeS2
S PyriteFeS2
S PyrrhotiteFe7S8
Ca CalciteCaCO3
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Cu ChalcopyriteCuFeS2
Ag SilverAg
Te TellurobismuthiteBi2Te3
Au GoldAu
Bi TellurobismuthiteBi2Te3

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

Early Jurassic - Late Devonian
174.1 - 382.7 Ma

ID: 2932853
Carboniferous-Permian sedimentary and volcanic rocks

Age: Phanerozoic (174.1 - 382.7 Ma)

Stratigraphic Name: Chilliwack Formation; Cultus Formation; Hozomeen Group; Bell Pass

Description: Sedimentary and volcanic rocks, undivided. Cherty and slaty argillite, siltstone, graywacke, chert, greenstone, tuff, andesite, and spilitic volcanics.

Comments: Dragovich and others, 2002, reports that this unit is mostly metamorphosed sedimentary rocks of the types listed above. Original map source: Raines, Gary L., and Johnson, Bruce R., 1996, Digital representation of the Washington state geologic map; a contribution to the Interior Columbia River basin ecosystem management project, U.S. Geological Survey Open-file report 95-0684, 20 p., plus digi

Lithology: Major:{graywacke}, Minor:{siltstone,greenstone,chert,argillite,shale, quartzite}, Incidental:{phyllite, arkose, andesite, limestone, marble, slate, conglomerate}

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]

Permian - Devonian
251.902 - 419.2 Ma

ID: 3189572
Paleozoic volcanic rocks

Age: Phanerozoic (251.902 - 419.2 Ma)

Lithology: Volcanic 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]

Devonian - Permian
358.9 - 298.9 Ma

ID: 1431590
Chilliwack Group of Cairnes (1944)

Age: Late Devonian (358.9 - 298.9 Ma)

Stratigraphic Name: Chilliwack Group

Lithology: Metavolcanic rocks

Reference: Washington State Department of Natural Resources, Division of Geology and Earth Resources. Washington Interactive Geologic Map: 1:100,000 scale. Washington Division of Geology and Earth Resources. [19]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

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