US Forest Service-Lower Pit, Clackamas Co., Oregon, USA
Latitude & Longitude (WGS84): | 45° 5' 31'' North , 122° 9' 13'' West |
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Latitude & Longitude (decimal): | 45.09194,-122.15361 |
GeoHash: | G#: c210s2drw |
Locality type: | Pit |
Köppen climate type: | Csb : Warm-summer Mediterranean climate |
REF:Deposit:: OR. DEPT. GEOL. AND MIN. INDUST. SPECIAL PAPER 3, 1978,
Deposit:: PLATE 1, NO. 187.
Commodities (Major) - Stone - Crushed/Broken
Development Status: Past 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: 1488141 | 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] |
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