Pacheco, Contra Costa Co., California, USA
Latitude & Longitude (WGS84): | 37° 59' 1'' North , 122° 4' 27'' West |
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Latitude & Longitude (decimal): | 37.98361,-122.07417 |
Köppen climate type: | Csb : Warm-summer Mediterranean climate |
A populated place (town).
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
Miocene - Eocene 5.333 - 56 Ma ID: 2753048 | Oligocene marine rocks Age: Cenozoic (5.333 - 56 Ma) Stratigraphic Name: Alegria Formation; Church Creek Formation; Gaviota Formation; Kirker Formation; San Emigdio Formation; San Lorenzo Formation; San Ramon Formation; Tumey Formation Description: Sandstone, shale, and conglomerate; in part Miocene and Eocene. Lithology: Major:{sandstone,mudstone}, Minor:{siltstone} 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] |
Eocene 33.9 - 56 Ma ID: 2541007 | Muir Sandstone of Weaver (1953) Age: Eocene (33.9 - 56 Ma) Description: Massive, yellow-weathering arkosic sandstone. Locally divided into upper member (Tlju) and lower member (Tljl). Upper member is sandstone. Lower member is claystone with thin sandstone in basal part. 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] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
Localities in this Region
- California
- Contra Costa Co.