Tertiary intrusive rocks (hypabyssal), unit 1 (Cascades Volcanic Field) (CATi1;0)

State	California
Name	Tertiary intrusive rocks (hypabyssal), unit 1 (Cascades Volcanic Field)
Geologic age	Tertiary
Original map label	Ti
Primary rock type	andesite
Secondary rock type	basalt
Other rock types	rhyolite; dacite
Lithologic constituents	Major Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Pluton) Minor Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basalt (Pluton) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Pluton) Incidental Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basaltic-andesite (Pluton) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Pluton)
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	Luedke, R.G., and Smith, R.L., 1981, Map showing distribution, composition, and age of late Cenozoic volcanic centers in California and Nevada: U.S. Geological Survey Miscellaneous Investigations Series Map I-1091-C, scale 1:1,000,000. [http://pubs.er.usgs.gov/publication/i1091C] Luedke, R.G., Smith, R.L., and Russell-Robinson, S.L., 1983, Map showing distribution, composition, and age of late Cenozoic volcanoes and volcanic rocks of the Cascade Range and vicinity, northwestern United States: U.S. Geological Survey Miscellaneous Investigations Series Map I-1507, scale 1:500,000. [http://pubs.er.usgs.gov/publication/i1507] Grose, T.L.T., 2000, Volcanoes in the Susanville region, Lassen, Modoc, Plumas Counties, northeastern California: California Geology, v. 53, p. 4-23. 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	Alpine - Lassen - Modoc - Mono - Plumas - Sierra - Siskiyou - Tehama - Tuolumne