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Electric Point Mine, Gladstone Mountain, Leadpoint, Northport District, Stevens Co., Washington, USA

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Latitude & Longitude (WGS84): 48° 52' 56'' North , 117° 32' 29'' West
Latitude & Longitude (decimal): 48.88222,-117.54139
Köppen climate type:Dfb : Warm-summer humid continental climate

This mine is located on Gladstone Mountain, Electric point is the promintory closest to the Mines of the area, Gladstone Mountain is part of the Kootenay Arc

It produced from 1901-1955

*Cannon, B. (1975): Minerals of Washington p.44,68
*Metal Mines of Washington-Preliminary Report; Derkey, Joseph, Lasmanis

Mineral List

7 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

Ordovician - Cambrian
443.8 - 541 Ma

ID: 2130518
Metaline Formation

Age: Paleozoic (443.8 - 541 Ma)

Lithology: Major:: {limestone, dolomite, shaly limestone, limestone conglomerate, carbonate-bearing quartzite}; Minor:: {black shale, sandy limestone, pebble conglomerate, argillite}

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]

Middle Ordovician - Early Cambrian
458.4 - 541 Ma

ID: 2939811
Cambrian limestone and dolomite

Age: Paleozoic (458.4 - 541 Ma)

Stratigraphic Name: Metaline Formation; Clugston Creek limestone; Northport Limestone; Old Dominion Limestone

Description: Mostly massive dolomite, with a basal unit of gray to dark-gray limestone interbedded with limy shale, and an upper unit of fine-grained massive limestone with some marble; Pend Oreille and northern and central Stevens Counties. Three-fold division less evident in Colville area. Dolomite, with minor basal unit of interbedded limestone and phyllite in the Addy-Dunn Mountain area of Stevens County. Marble, dolomite, limestone, and limy slate in Hunters' district. Dolomitic marble in southern Stevens and northern Lincoln Counties. Middle Cambrian fossils near base in Metaline district, and Bathyuriscus-Elrathina fauna in lower unit in Leadpoint district. Phosphatic brachiopods in upper unit in Leadpoint district tentatively assigned to Middle and Upper Cambrian.

Comments: This unit includes Devonian Limestone as mapped by Park and Cannon (1943), though they make the disclaimer that the outcrop may actually be Cambrian. Even though the source description reports that most of this unit is dolomite, referenced sources for listed stratigraphic units report that limestone with dolomitization is most prevalent in some localities. Mapped as metasedimentary (metalimestone, metadolostone, meta-argillite, and metasiltite) by Stoffel and others, 1991. Stoffel and others, 1991, report that while the term "Old Dominion limestone" was once widely used, it has since been abandoned.

Lithology: Major:{limestone,dolostone}, Minor:{marble}, Incidental:{phyllite, conglomerate, sedimentary breccia, argillite}

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]

Cambrian - Ordovician
485.4 Ma

ID: 1409850
Metaline Formation, bedded dolomite of

Age: Furongian (485.4 Ma)

Lithology: Metacarbonate

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]

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

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