Richmond, Contra Costa Co., California, USA
Latitude & Longitude (WGS84): | 37° 56' 8'' North , 122° 20' 48'' West |
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Latitude & Longitude (decimal): | 37.93583,-122.34667 |
KΓΆppen climate type: | Csb : Warm-summer Mediterranean climate |
A populated place (city) located on San Francisco Bay.
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-localities1 valid mineral.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramRegional 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
Holocene - Pleistocene 0 - 2.588 Ma ID: 2542213 | Surficial deposits, undivided Age: Pleistocene (0 - 2.588 Ma) Description: For more detailed reports of surficial deposits, see Helley and others (1979), Atwater (1982), Herd (1978 a, b), and Borchardt and Seelig (1991). 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] |
Holocene - Pliocene 0 - 5.333 Ma ID: 2811992 | Quaternary alluvium and marine deposits Age: Cenozoic (0 - 5.333 Ma) Stratigraphic Name: Temescal Formation; Modesto Formation; Victor Formation; Alameda Formation; Aromas Red Sands; Bautista Beds; Brawley Formation; Borrego Formation; Burnt Canyon Breccia; Cabezon Fanglomerate; Campus Formation; Casitas Formation; Chemehuevi Formation; Corcoran Clay; Cushenbury Springs Formation; Dos Picachos Gravels; Dripping Springs Formation; Frazier Mountain Formation; Friant Formation; Harold Formation; Heights Fanglomerate; Hookton Formation (part); Huichica Formation; La Habra Formation; Manix Lake Beds; Mohawk Lake Beds; Montezuma Formation; Nadeau Gravel; Ocotillo Conglomerate; Orcutt Formation; Pacoima Formation; Pauba Formation; Peckham Formation; Pinto Formation; Resting Springs Formation; Riverbank Formation; Rohnerville Formation; San Dimas Formation; Shoemaker Gravel; Temecula Arkose; Battery Formation; Bay Point Formation; Colma Formation; Lindavista Formation; Lomita Marl; Merritt Sand; Millerton Formation; Palos Verdes Sand; San Pedro Formation; Sweitzer Formation; Timms Point Silt Description: Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast. Lithology: Major:{coarse alluvium}, Minor:{fine alluvium} 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] |
Holocene 0 - 0.0117 Ma ID: 2529806 | Alluvial fan and fluvial deposits Age: Anthropocene (0 - 0.0117 Ma) Description: Alluvial fan deposits are brown or tan, medium dense to dense, gravely sand or sandy gravel that generally grades upward to sandy or silty clay. Near the distal fan edges, the fluvial deposits are typically brown, never reddish, medium dense sand that fines upward to sandy or silty clay. The best developed Holocene alluvial fans are on the San Francisco Bay plain. All other alluvial fans and fluvial deposits are confined to narrow valley floors Reference: Graymer, R.W. Geologic Map and Map Database of the Oakland Metropolitan Area, Alameda, Contra Costa, and San Francisco Counties, California. U.S. Geological Survey Miscellaneous Field Studies MFβ2342. [82] |
Quaternary 0 - 2.588 Ma ID: 2709603 | Undifferentiated surficial deposits Age: Pleistocene (0 - 2.588 Ma) Description: Includes beach sand, marine deposits, artificial fill, alluvium, landslides, and, in South San Francisco quadrangle, some Colma Formation 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] |
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