This list encompasses several different environments of the Golden Horn Batholith at Washington Pass.
Collectors traditionally dig at least 3 miles or more from the pass (Saul Krotki information); strictly speaking the correct locality is North Cascade Highway, milepost XXX, Okanogan County, WA.
References
- Boggs, Russell C. (1980): Okanoganite, a new rare-earth borofluorosilicate from the Golden Horn Batholith, Okanogan County, Washington. American Mineralogist, 65, 1138-1142.
- Boggs, Russell C. (1988): Calciohilairite: CaZrSi3O9.3H2O, the calcium analogue of hilairite from the Golden Horn batholith, northern Cascades, Washington. American Mineralogist, 73, 1191-1194.
- Stull, Robert J. (1973): Calcic and alkali amphiboles from North Cascades, the Golden Horn Batholith, Washington. American Mineralogist, 58, 873-878.
- Mineralogical Record 14:51
- Rocks and Minerals 66:6 (453-458)
- Micro Probe V. VI No. 8
- Cannon, B. (1975): Minerals of Washington, p.38,49,51
- Boggs, R. C. (1984): Mineralogy and Geochemistry of the Golden Horn Batholith Northern Cascades, Washington UC Santa Barbara
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