Laurel Hill Quarry (US Forest Service 25; US Forest Service 24), Clackamas Co., Oregon, USA
Latitude & Longitude (WGS84): | 45° 18' 22'' North , 121° 49' 47'' West |
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Latitude & Longitude (decimal): | 45.30611,-121.82972 |
GeoHash: | G#: c213exwr1 |
Locality type: | Quarry |
Köppen climate type: | Csb : Warm-summer Mediterranean climate |
REF:Deposit:: OR. DEPT. GEOL. AND MIN. INDUST. SPECIAL PAPER 3, 1978,
Deposit:: PLATE 1, NO. 75.
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
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] |
Miocene 5.333 - 23.03 Ma ID: 1442926 | Late Western Cascade Volcanics Age: Miocene (5.333 - 23.03 Ma) Description: Intrusive rocks of Laurel Hill; intermediate composition lithologies Lithology: Major:: {quartz monzonite intrusives}; Major:: {quartz diorite intrusives, metamorphism: hornblende hornfels zone, epidote hornfels zone} Minor:: {granophyre intrusives} Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20] |
Tortonian - Aquitanian 7.246 - 23.03 Ma ID: 2739890 | Hypabyssal intrusive rocks Age: Miocene (7.246 - 23.03 Ma) Description: Hypabyssal, medium-grained, hornblende diorite and quartz diorite in small stocks and large dikes; includes intrusions of medium- to fine-grained gabbro and plugs and small stocks of medium-grained, holocrystalline, olivine andesite. Also includes medium-grained, commonly porphyritic biotite quartz monzonite and leucocratic granodiorite. Many of these intrusive bodies are moderately to intensely propylitized, as are wallrocks they intrude; locally, along shears, the rocks also are sericitized. Potassium-argon ages on several of these shallow intrusions range from about 8 Ma to about 22 Ma (Wise, 1969; Bikerman, 1970; Sutter, 1978; Power and others, 1981a, b; Fiebelkorn and others, 1983) Lithology: Major:{diorite,quartz diorite}, Incidental:{gabbro, quartz monzonite, granodiorite, hypabyssal andesite} 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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