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US Forest Service-Upper Mitchell, Clackamas Co., Oregon, USA

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Latitude & Longitude (WGS84): 45° 5' 57'' North , 122° 1' 20'' West
Latitude & Longitude (decimal): 45.09917,-122.02222
GeoHash:G#: c210x641s
Köppen climate type:Csb : Warm-summer Mediterranean climate


REF:Deposit:: OR. DEPT. GEOL. AND MIN. INDUST. SPECIAL PAPER 3, 1978,
Deposit:: PLATE 1, NO. 195.
Commodities (Major) - Stone - Crushed/Broken
Development Status: Producer


Commodity List

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


No minerals currently recorded for this locality.

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

Quaternary
0 - 2.588 Ma



ID: 1456071
Quaternary surficial deposits; Landslide deposits

Age: Pleistocene (0 - 2.588 Ma)

Description: Landslide deposits; mixed grained sediments

Lithology: Major:: {landslide, blocks of various formations clasts; matrix: fine material}

Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20]

Neogene
2.588 - 23.03 Ma



ID: 3186305
Cenozoic volcanic rocks

Age: Neogene (2.588 - 23.03 Ma)

Stratigraphic Name: Columbia River Basalt

Comments: Columbia Plateau

Lithology: Flood basalt(s); mafic volcanic rocks; basalt

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Middle Miocene - Early Miocene
11.62 - 23.03 Ma



ID: 2805879
Grande Ronde Basalt

Age: Miocene (11.62 - 23.03 Ma)

Stratigraphic Name: Grande Ronde Basalt

Description: Flows of dark-gray to black, aphyric tholeiitic basalt, including both high- and low-Mg chemical types (Swanson and others, 1979). Potassium-argon ages mostly in the range of 15 to 17 Ma (Lux, 1982; Watkins and Baksi, 1974; Fiebelkorn and others, 1983)

Comments: In La Grange 30' x 60' quadrangle (OR291), unit is divided into: N2 magnetostratigraphic unit (msu; middle Miocene), pyroclastic vent deposits (middle Miocene), Ferroandesite of Fiddlers Hell (middle Miocene), R2 msu (middle Miocene), N1 msu (middle Miocene), and R1 msu (lower and middle Miocene). Radiometric ages range from about 15.5 to 17 Ma. In Umatilla River Basin (OR292), unit includes Fiddlers Hell Member, N2 magnetostratigraphic unit (msu) , Sentinel Bluffs unit, Winter Water unit, R2 msu, and N1 msu. Radiometric ages range from about 15.5 to 16.1

Lithology: Major:{basalt}

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]

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



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