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Spokane Co., Washington, USA

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Location is approximate, based on center of defined region.
 
Latitude & Longitude (WGS84): 47° 39' 53'' North , 117° 25' 44'' West
Latitude & Longitude (decimal): 47.66482,-117.42895
Neighbouring regions:


Washington State county centrally located north to south and abutting Idaho on the eastern border. The county has a total area of 4,610 km2 (1,781 square miles) and is the 4th most populous county in Washington State. Geological information is contained in the Digital Geological Map in the reference section. County coordinates are given for Spokane as it is the county seat.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

38 valid minerals. 1 (TL) - type locality of valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Pleistocene
0.0117 - 2.588 Ma



ID: 3010156
Younger glacial drift

Age: Pleistocene (0.0117 - 2.588 Ma)

Stratigraphic Name: Vashon Drift; Steilacoom Gravel; Washtucna Gravel; Sumas Drift

Description: Advance and recessional outwash, stratified drift, and associated deposits. Primarily silt, sand, and gravel with some clay. Includes alluvium locally and scabland deposits of eastern Washington.

Comments: Vashon Drift: outwash member, Steilacoom gravels; Washtucna gravel; Sumas Drift (in part); Principally Wisconsin in age. Includes outburst flood deposits from glacial Lake Missoula in the Channeled Scablands.

Lithology: Major:{fine alluvium,coarse alluvium}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Miocene
5.333 - 23.03 Ma



ID: 1416767
Grande Ronde Basalt, N2 (CRB)

Age: Miocene (5.333 - 23.03 Ma)

Lithology: Basalt flows (GrandeRondeBasalt,upper flows of norm.mag.pol.)

Reference: Washington State Department of Natural Resources, Division of Geology and Earth Resources. Washington Interactive Geologic Map: 1:100,000 scale. Washington Division of Geology and Earth Resources. [19]

Middle Miocene
11.62 - 15.97 Ma



ID: 2093501
Grande Ronde Basalt, magnetostratigraphic unit N2

Age: Miocene (11.62 - 15.97 Ma)

Lithology: Major:: {basalt}

Reference: Zientek, M.L., P.D. Derkey, R.J. Miller, J.D. Causet et al. Spatial Databases for the Geology of the Northern Rocky Mountains - Idaho, Montana, and Washington. U.S. Geological Survey Open-File Report 2005-1235 Version 1.0. [25]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region


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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Johnson, Bruce R., Derkey, Pamela D., Frost, Thomas P., Derkey, Robert E., Lackaff, Beatrice B. (1998) Digital Geological map of Spokane County and vincinity, Washington and Idaho, USGS Open-File Report 98-503

Mineral and/or Locality  
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