| State | California |
|---|---|
| Name | Tertiary pyroclastic and volcanic mudflow deposits, unit 6 (Jacumba) |
| Geologic age | Tertiary (12-19 Ma) |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic-lahar, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic-lahar, Volcaniclastic-volcanic breccia)
Minor
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic-lahar, Volcaniclastic-volcanic breccia)
|
| Stratigraphic units | Jacumba Pyroclastics |
| References | Todd, V.R., 2004, Preliminary Geologic map of the El Cajon 30 min x 60 min quadrangle, southern California. U.S. Geological Survey Open-file report 2004-1361 (url http://pubs.usgs.gov/of/2004/1361.https://pubs.er.usgs.gov/publication/ofr20041361 Stanley, R.G., Wilson, D.S., and McCrory, P.A., 2000, Locations and ages of middle Tertiary volcanic centers in coastal California: U.S. Geological Survey Open-File Report 00-154, 27 p., url http://geopubs.wr.usgs.gov/open-file/of00-154/https://pubs.er.usgs.gov/publication/ofr00154 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 | Imperial |