State | Oregon |
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Name | Basalt and basaltic andesite |
Geologic age | Pliocene to Pleistocene |
Lithologic constituents | Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic, Flow, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Pyroclastic, Flow, Volcaniclastic-volcanic breccia)
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References | Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.Trimble, D.E., 1963, geology of Portland, Oregon, and adjacent areas: U.S. Geological Survey Bulletin 1119, 110 p.https://pubs.er.usgs.gov/publication/b1119 Hampton, E.R., 1972, Geology and groundwater of the Molalla-Salem area, northern Willamette Valley, Oregon: U.S. Geological Survey Water-Supply Paper 1997, 83 p.https://pubs.er.usgs.gov/publication/wsp1997 |
NGMDB product | |
Counties | Clackamas - Crook - Deschutes - Douglas - Harney - Hood River - Jackson - Jefferson - Klamath - Lake - Lane - Linn - Malheur - Marion - Multnomah - Wasco - Washington |