 | Horse Lake Mountain Hornblende Occurence, Wenatchee Mining District, Chelan County, Washington, USA |
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GEOLOGY
Hornblende Andesite Intrusions of the Horse Lake Mountain Complex - ~30 Ma[million years ago]. Multiple hornblende andesite intrusions occur within Chumstick Formation sandstone, present in the vicinity of Horse Lake Mountain.
The Black Tuesday Claim is owned and operated by Thea Stender, who is currently mining these world-class specimens.
If you want more information about this locality or are interested in purchasing one of these mined specimens, please visit Thea's Facebook , Instagram, or Etsy pages (Confluence Minerals).
MINERALS
| NaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 - Occurs as well-formed black euhedral phenocrysts in light gray andesite. |
MAGNESIO-HASTINGSITE |
Washington Division of Geology and Earth Resources, 1983, Geology of the Wenatchee and Monitor Quadrangles, Chelan and Douglas Counties, Washington, Bulletin 75, scale 1:24,000, 3 plates.