Port Costa, Contra Costa Co., California, USA
Latitude & Longitude (WGS84): | 38° 2' 47'' North , 122° 10' 55'' West |
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Latitude & Longitude (decimal): | 38.04639,-122.18222 |
KΓΆppen climate type: | Csb : Warm-summer Mediterranean climate |
A populated place (town) located on the S shore of the Carquinez Strait.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localitiesRock Types Recorded
Rock list contains entries from the region specified including sub-localities
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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
Holocene 0 - 0.0117 Ma ID: 2592212 | Alluvial fan deposits Age: Anthropocene (0 - 0.0117 Ma) Description: Moderately to poorly sorted and moderately to poorly bedded sand, gravel, silt, and clay deposited where streams emanate from upland regions onto more gently sloping valley floors or plains. Holocene alluvial fan deposits are mostly undissected by later erosion. In places, Holocene deposits may only form a thin layer over Pleistocene and older deposits Reference: Graymer, R.W., D.L. Jones, E.E. Brabb. Geologic Map and Map Database of Northeastern San Francisco Bay Region, California. U.S. Geological Survey Miscellaneous Field Studies Map MF-2403. [92] |
Ma ID: 2540968 | Age: Anthropocene ( Ma) Reference: Graymer, R.W., D.L. Jones, E.E. Brabb. Preliminary geologic map emphasizing bedrock formations in Contra Costa County, California. U.S. Geological Survey Open-File Report 94-622. [86] |
Maastrichtian - Cenomanian 66 - 100.5 Ma ID: 3022650 | Upper Cretaceous marine rocks, unit 1 (Upper Great Valley Sequence) Age: Late Cretaceous (66 - 100.5 Ma) Stratigraphic Name: Adobe Flat Shale Member; Asuncion Group; Atascadero Formation; Bald Hills Formation; Chico Formation; Forbes Formation; Funks Formation; Gualala Group; Guinda Formation; Jack Creek Formation; Jalama Formation; Kione Sand; Ladd Formation; Moreno Formation; Panoche Formation; Pigeon Point Formation; Rosario Formation; Salt Creek Conglomerate; Sites Formation; Venado Formation; Williams Formation; Yolo Formation; Great Valley Sequence; Boxer Formation; Cortina Formation; Rumsey Formation; Budden Canyon Formation; Tuna Canyon Formation; Rosario Group; Lusardi Formation; Point Loma Formation; Cabrillo Formation Description: Upper Cretaceous sandstone, shale, and conglomerate Comments: Coast Ranges, western Transverse Ranges, Peninsular Range. Upper part of Great Valley Sequence. Thick, extensive sequences of shale, siltstone, sandstone, and conglomerate primarily of deep-marine (turbidite) facies Lithology: Major:{sandstone,siltstone mudstone}, Incidental:{conglomerate} 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] |
Late Cretaceous 66 - 100.5 Ma ID: 3031808 | Great Valley Sequence Age: Late Cretaceous (66 - 100.5 Ma) Stratigraphic Name: Great Valley Sequence Description: Sandstone, siltstone, shale and minor conglomerate; Reference: Wagner, D.L., and C.I. Gutierrez. Geologic map of the Napa 30' x 60' quadrangle, California. California Geological Survey. [138] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
Localities in this Region
- California
- Contra Costa Co.