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Twin Sisters Mountain, Sisters Mining District, Whatcom County, Washington, USAi
| Regional Level Types | |
|---|---|
| Twin Sisters Mountain | Mining District |
| Sisters Mining District | Mining District |
| Whatcom County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
48° 42' 38'' North , 121° 59' 35'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Dunites composing the majority of the Twin Sisters Mountains.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Anthophyllite Formula: ◻Mg2Mg5(Si8O22)(OH)2 References: |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 References: |
| ⓘ Clinochlore Formula: Mg5Al(AlSi3O10)(OH)8 References: |
| ⓘ Clinochlore var. Chromium-bearing Clinochlore Formula: Mg5(Al,Cr)2Si3O10(OH)8 References: |
| ⓘ Enstatite Formula: Mg2Si2O6 Description: rock forming mineral in dunites of the region References: |
| ⓘ 'Fayalite-Forsterite Series' References: |
| ⓘ Sepiolite Formula: Mg4(Si6O15)(OH)2 · 6H2O |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
| ⓘ Uvarovite Formula: Ca3Cr3+2(SiO4)3 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Group 9 - Silicates | |||
| ⓘ | Uvarovite | 9.AD.25 | Ca3Cr3+2(SiO4)3 |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Anthophyllite | 9.DD.05 | ◻Mg2Mg5(Si8O22)(OH)2 |
| ⓘ | Clinochlore | 9.EC.55 | Mg5Al(AlSi3O10)(OH)8 |
| ⓘ | var. Chromium-bearing Clinochlore | 9.EC.55 | Mg5(Al,Cr)2Si3O10(OH)8 |
| ⓘ | Sepiolite | 9.EE.25 | Mg4(Si6O15)(OH)2 · 6H2O |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- Bridge RiverAccretionary Complex
- Franciscan DomainDomain
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References
Cannon, Bart (1975) Minerals of Washington. Cordilleran. 184 pp.pages 47, 73, 74, 85
Twin Sisters Mountain, Sisters Mining District, Whatcom County, Washington, USA