| State | California |
|---|---|
| Name | Tertiary intrusive rocks (hypabyssal), unit 9 (Jurassic gabbros along Hayward Fault) |
| Geologic age | Jurassic |
| Lithologic constituents | Major
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
|
| References | Graymer, R.W., 2000, 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 Map MF-2342, 29 p., scale 1:50,000.https://pubs.er.usgs.gov/publication/mf2342 Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000. |
| NGMDB product | |
| Counties | Alameda - Contra Costa |