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Quaternary pyroclastic and volcanic mudflow deposits, unit 1 (Cascade Volcanic Field)

Quaternary pyroclastic and volcanic mudflow deposits.
StateCalifornia
NameQuaternary pyroclastic and volcanic mudflow deposits, unit 1 (Cascade Volcanic Field)
Geologic ageQuaternary
Original map labelQvp
Primary rock typeandesite
Secondary rock typerhyolite
Other rock typesbasalt; tuff; ash-flow tuff; ignimbrite
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, lahar)
Minor
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, ash-flow)
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic)
Incidental
Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic, lahar)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic, lahar)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (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.
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 coverageSiskiyou

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