Tertiary volcanic flow rocks, unit 11 (Jacumba) (CATv11;0)

State	California
Name	Tertiary volcanic flow rocks, unit 11 (Jacumba)
Geologic age	Tertiary (12-19 Ma)
Original map label	Tv
Primary rock type	basalt
Secondary rock type	andesite
Other rock types	pyroclastic
Lithologic constituents	Major Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Incidental Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic) Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic, lahar) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow) Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, lahar) Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, volcanic breccia)
Map references	Jennings, C.W., Strand, R.G., and Rogers, T.H., 1977, Geologic map of California: California Division of Mines and Geology, scale 1:750,000.
Unit 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. [http://pubs.er.usgs.gov/publication/ofr20041361] [http://pubs.usgs.gov/of/2004/1361.] 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/ [http://pubs.er.usgs.gov/publication/ofr00154] [http://geopubs.wr.usgs.gov/open-file/of00-154/] Jennings, C.W., Strand, R.G., and Rogers, T.H., 1977, Geologic map of California: California Division of Mines and Geology, scale 1:750,000.
Geographic coverage	Imperial - San Diego