 | near North Bend, King County, Washington, USA |
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LOCALITY IMAGES
GEOLOGY
Skarn Deposit, periphery of Snoqualmie Batholith - late Oligocene to early Miocene (28 Ma[million years ago] to 22 Ma).
The Denny Mountain skarn (tactite) deposit is exposed in a deep canyon drainage that flows into Denny Creek. The skarn formed by metasomatism of Jurassic/Triassic age sedimentary rocks during intrusion of the Snoqualmie Batholith.
MINERALS (complete list) CLICK for PHOTOGRAPHED
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Actinolite (Byssolite)-
Ca2(Mg,Fe)5(Si8O22)(OH)2
*Calcite- CaCO3 Diopside- (Ca,Mg)SiO3 Epidote- Ca2Al3Si3O12(OH) *Garnet (Grossular)- Ca3Al2Si3O12 Goethite- FeO(OH) *Hematite- Fe2O3 *Lepidocrocite- gamma-FeO(OH) Malachite- Cu2CO3(OH)2 *Orthoclase (Adularia)- KAlSi3O8 Pyrite- FeS2 *Quartz- SiO2 *Scheelite- CaWO4 |
Grossular GARNET and CALCITE |
Raspberry QUARTZ scepter with LEPIDOCROCITE inclusions |
HEMATITE rose |
Japan Law Twin QUARTZ |
Raspberry QUARTZ scepter cluster with LEPIDOCROCITE inclusions |
Raspberry QUARTZ scepter cluster with LEPIDOCROCITE inclusions |
SCHEELITE |
ORTHOCLASE (ADULARIA) |
