Cenozoic Stratigraphy of the Owyhee Region, Southeastern Oregon

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dc.contributor.authorKittleman, Laurence R.
dc.contributor.authorGreen, Arthur R.
dc.contributor.authorHagood, Allen R.
dc.contributor.authorJohnson, Arvid M.
dc.contributor.authorMcMurray, Jay M.
dc.contributor.authorRussell, Robert G.
dc.contributor.authorWeeden, Dennis A.
dc.date.accessioned2016-08-01T20:54:10Z
dc.date.available2016-08-01T20:54:10Z
dc.date.issued1965-12
dc.description54 pagesen_US
dc.description.abstractLate Cenozoic terrestrial sedimentation and volcanism produced more than 6000 ft of complexly interstratified rocks in the Owyhee region, southeastern Oregon. Deposition upon a basement of peripherally exposed Paleozoic and Mesozoic rocks began in Miocene time and continued intermittently through the Pleistocene. High-angle block faulting related to the adjacent Basin and Range Province created hundreds to thousands of feet of structural relief. Faulting and concomitant erosion formed north-trending basins that received Miocene, Pliocene, and Pleistocene deposits. The rocks described range from late Miocene to sub-historic. They are dated through mammalian chronology, stratigraphic relations, and potassium· argon chronology. About 30 stratigraphic units are discussed, of which 12 are named and defined. Extrusive rocks are olivine-poor clinopyroxene basalts, porphyritic andesine rhyolites, and rhyolitic welded ash-flow tuffs. Clastic rocks are arkoses, granite-cobble conglomerates, air-fall tuffs, and fluviatile and lacustrine bentonitic volcaniclastic rocks variously adulterated with plutonic detritus.en_US
dc.description.sponsorshipThis study was sponsored by the Museum of Natural History, University of Oregon, principally through grants and programs of the National Science Foundation.en_US
dc.identifier.issn00786047
dc.identifier.urihttps://hdl.handle.net/1794/19996
dc.language.isoen_USen_US
dc.publisherMuseum of Natural History, University of Oregonen_US
dc.relation.ispartofseriesBulletin of the Museum of Natural History, University of Oregon, no. 1;
dc.rightsCreative Commons BY-NC-ND 4.0-USen_US
dc.subjectCenozoicen_US
dc.subjectVolcanoen_US
dc.subjectOwyheeen_US
dc.subjectMioceneen_US
dc.subjectPaleozoicen_US
dc.subjectPleistoceneen_US
dc.titleCenozoic Stratigraphy of the Owyhee Region, Southeastern Oregonen_US
dc.typeArticleen_US
dcterms.publisherMuseum of Natural History, University of Oregon

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Bulletin of the Museum of Natural History, University of Oregon