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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Apex Prospect, North Fork of the Skokomish River Area, Mason County, Washington, USAi
Regional Level Types
Apex ProspectProspect
North Fork of the Skokomish River AreaRiver
Mason CountyCounty
WashingtonState
USACountry

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Latitude & Longitude (WGS84):
47° 30' 6'' North , 123° 20' 8'' West
Latitude & Longitude (decimal):
47.50176,-123.33575
GeoHash:
G#: c22q1rmtu
GRN:
N32W61
Type:
Prospect
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Hoodsport376 (2011)18.2km
Skokomish617 (2011)23.0km
Union631 (2011)24.0km
Shelton9,834 (2011)36.4km
Brinnon797 (2011)38.3km
Mindat Locality ID:
17406
Long-form identifier:
mindat:1:2:17406:1
GUID (UUID V4):
0
Other/historical names associated with this locality:
Dewey Prospect


A manganese prospect near Lake Cushman. The ore occurred as a lens near the contact of limestone and basalt. It was developed in several short adits and cuts. A small amount of drilling was conducted by the US Bureau of Mines.

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


5 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘCopper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘJacobsite4.BB.05Mn2+Fe3+2O4
Group 5 - Nitrates and Carbonates
ⓘRhodochrosite5.AB.05MnCO3
Group 9 - Silicates
ⓘBementite9.EE.05Mn7Si6O15(OH)8

List of minerals for each chemical element

HHydrogen
Hⓘ BementiteMn7Si6O15(OH)8
CCarbon
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ BementiteMn7Si6O15(OH)8
Oⓘ JacobsiteMn2+Fe23+O4
Oⓘ RhodochrositeMnCO3
SiSilicon
Siⓘ BementiteMn7Si6O15(OH)8
SSulfur
Sⓘ PyriteFeS2
MnManganese
Mnⓘ BementiteMn7Si6O15(OH)8
Mnⓘ JacobsiteMn2+Fe23+O4
Mnⓘ RhodochrositeMnCO3
FeIron
Feⓘ JacobsiteMn2+Fe23+O4
Feⓘ PyriteFeS2
CuCopper
Cuⓘ CopperCu

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Iverson, S.R. (1982) Mineral Resources of the Wonder Mountain RARE II Area (No. 6086) Mason County, Washington. U.S. Bureau of Mines Open-File Report 105-82
Green, S.T. (1945) Manganese Deposits of the Olympic Peninsula, Washington. State of Washington Department of Conservation and Development Division of Mines and Mining Report of Investigations No. 7, 49 pages.
Valentine, Grant M., Huntting, Marshall T. (1960) Part II - Metallic Minerals, in Inventory of Washington Minerals. Vol II. Bulletin 37, Washington Geological Survey.
Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA.
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