Tertiary volcanic flow rocks, unit 17 (Cascade Range) (CATv17;0)

State	California
Name	Tertiary volcanic flow rocks, unit 17 (Cascade Range)
Geologic age	Tertiary (2-24 Ma)
Original map label	Tv
Primary rock type	andesite
Secondary rock type	basalt
Other rock types	rhyolite; dacite; volcanic breccia (agglomerate)
Lithologic constituents	Minor Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Incidental Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic, lahar) 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 > Felsic-volcanic > Dacite (Dome) Igneous > Volcanic > Felsic-volcanic > Dacite (Flow) Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Dome) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic)
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 - Butte - Calaveras - Lassen - Modoc - Mono - Nevada - Placer - Plumas - Shasta - Sierra - Siskiyou - Stanislaus - Tehama - Tuolumne