Mullan Mine, Chewelah, Chewelah District, Stevens Co., Washington, USA
|Latitude & Longitude (WGS84):||48° 16' 37'' North , 117° 38' 52'' West|
|Latitude & Longitude (decimal):||48.27722,-117.64800|
|Köppen climate type:||Dsb : Warm, dry-summer continental climate|
*Cannon, B. (1975): Minerals of Washington, p.61
11 valid minerals.
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
0.0117 - 2.588 Ma
|Glacial drift, undivided|
Age: Pleistocene (0.0117 - 2.588 Ma)
Stratigraphic Name: Nespelem Silt; Salmon Springs Drift: Wingate Hills Drift; Hayden Creek Drift; Vashon Drift; Sumas Drift
Comments: Nespelem silt (in part); Salmon Springs Stade: Wingate Hills Drift, Hayden Creek Drift; Vashon Drift (in part); Sumas Drift; Primarily located in northeast Washington with some deposits along the Skagit River and near Eatonville. The Hayden Creek and Wingate Hill Drifts are alpine glacial deposits. The drift in northeast Washington was deposited by the Cordilleran Ice Sheet in Late and pre-Late Wisconsin (Stoffel and others, 1991). Most deposits are gravel to fine-grained sand. Finer-grained material (silt and clay) is incidental.
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. 
1000 - 1600 Ma
|Ravalli Group, Revett Fm., Belt Supergroup|
1000 - 1600 Ma
Age: Mesoproterozoic (1000 - 1600 Ma)
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.