Shafter, Marin Co., California, USA
| Latitude & Longitude (WGS84): | 38° 0' 15'' North , 122° 42' 26'' West |
|---|---|
| Latitude & Longitude (decimal): | 38.00444,-122.70750 |
| Köppen climate type: | Csb : Warm-summer Mediterranean climate |
A populated place (hamlet) located N of Kent Lake.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.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
| Eocene - Late Jurassic 33.9 - 163.5 Ma ID: 3030425 | Greenstone (altered mafic volcanic rocks) and metagreenstone of the Franciscan Complex Mélange Age: Phanerozoic (33.9 - 163.5 Ma) Stratigraphic Name: Franciscan Complex Description: Parts of the Franciscan are a chaotic mixture of fragmented rock masses in a sheared shaly matrix. Coherent rocks masses large enough to be shown on this map are divided into specific types. The unit gs represents greenstone (altered mafic volcanic rocks) and metagreenstone Reference: Wagner, D.L., and C.I. Gutierrez. Geologic map of the Napa 30' x 60' quadrangle, California. California Geological Survey. [138] |
| Cretaceous - Jurassic 66 - 201.3 Ma ID: 2945486 | Mesozoic volcanic rocks, unit 1 (Coast Ranges) Age: Mesozoic (66 - 201.3 Ma) Stratigraphic Name: Cuesta Diabase; Del Puerto Keratophyre Member; Franciscan Complex; Lotta Creek Tuff Member; Osos Basalt Description: Undivided Mesozoic volcanic and metavolcanic rocks. Andesite and rhyolite flow rocks, greenstone, volcanic breccia and other pyroclastic rocks; in part strongly metamorphosed. Includes volcanic rocks of Franciscan Complex: basaltic pillow lava, diabase, greenstone, and minor pyroclastic rocks. Comments: Coast Ranges. Jurassic to Cretaceous volcanic rocks of Franciscan Complex: basaltic pillow lava, diabase, greenstone, and minor pyroclastic rocks. Includes blueschist-grade metabasalt schist. Also includes small areas of volcanic rocks associated with Coast Range ophiolite Lithology: Major:{greenstone}, Minor:{basalt,schist}, Incidental:{diorite, chert, felsic volcanic} 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] |
| Jurassic 145 - 201.3 Ma ID: 2709529 | Franciscan Complex Age: Jurassic (145 - 201.3 Ma) Stratigraphic Name: Franciscan Complex Description: Greenstone: Consists of pillow lava and less abundant tuff, breccia, and intrusive basalt, diabase, and rare gabbro. Local lenses of thin-bedded radiolarian chert are as thick as 30 m. Fresh rock is hard, relatively unsheared, and ranges from essentially structureless to strongly pillowed; deeply weathered in places; crops out in elongate masses as long as 14 km, which, with one exception, are aligned in a northwest-trending band 5 kilometers east of the San Andreas Fault Zone Reference: Blake, M.C. Jr., R.W. Graymer, and D.L. Jones. Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California. U.S. Geological Survey Miscellaneous Field Studies MF 2337. [38] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
Localities in this Region
- California
- Marin Co.
- Shafter
- Marin Co.
