1. Mineral Resources
  2. Online Spatial Data
  3. Geology
  4. by state
  5. Oregon

Tuffaceous sedimentary rocks and tuffs

XML
JSON
Shapefile
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

Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.

Walker, G.W., 1977, Geologic map of Oregon east of the 121st meridian: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-902, scale 1:500,000.

https://pubs.er.usgs.gov/publication/i902

Macleod, N.S., Sherrod, D.R., Chitwood, L.A., and McKee, E.H., 1981, Newberry volcano, Oregon, in Johnston, D. A. and Donnelly-Nolan, Julie, eds., Guides to some volcanic terranes in Washington, Idaho, Oregon, and northern California: U.S. Geological Survey Circular 838, 189 p.

https://pubs.er.usgs.gov/publication/cir838

Macleod, N.S., Sherrod, D.R., and Chitwood, L.A., 1982, Geologic map of Newberry volcano, Deschutes, Klamath, and Lake Counties, Oregon: U.S. Geological Survey Open-File Report 82-847, 27 p., scale 1: 62,500.

https://pubs.er.usgs.gov/publication/ofr82847
NGMDB product
Counties Deschutes - Lake