Tuffaceous sedimentary rocks and tuffs

Rhyolitic to andesitic ash-flow tuffs, pumice-fall deposits, minor mud flows, and older alluvium on the flanks of Newberry volcano (MacLeod and others, 1981; 1982) and in areas west and northwest of Bend
State Oregon
Name Tuffaceous sedimentary rocks and tuffs
Geologic age Pliocene to Early Pleistocene
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic-ash flow)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic-air fall, Pyroclastic-ash flow)Containsrhyolitic to andesitic ash-flow tuff, pumice fall deposits, minor mudflows,and alluvium on flanks of newberry Volcano
Minor
Sedimentary > Clastic > Conglomerate (Bed)
Comments Unit also occurs in eastern Oregon
References
NGMDB product
Counties Deschutes - Lake