dc.contributor.author |
Kittleman, Laurence R. |
|
dc.contributor.author |
Green, Arthur R. |
|
dc.contributor.author |
Hagood, Allen R. |
|
dc.contributor.author |
Johnson, Arvid M. |
|
dc.contributor.author |
McMurray, Jay M. |
|
dc.contributor.author |
Russell, Robert G. |
|
dc.contributor.author |
Weeden, Dennis A. |
|
dc.date.accessioned |
2016-08-01T20:54:10Z |
|
dc.date.available |
2016-08-01T20:54:10Z |
|
dc.date.issued |
1965-12 |
|
dc.identifier.issn |
00786047 |
|
dc.identifier.uri |
http://hdl.handle.net/1794/19996 |
|
dc.description |
54 pages |
en_US |
dc.description.abstract |
Late 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.sponsorship |
This 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.language.iso |
en_US |
en_US |
dc.publisher |
Museum of Natural History, University of Oregon |
en_US |
dc.relation.ispartofseries |
Bulletin of the Museum of Natural History, University of Oregon, no. 1; |
|
dc.rights |
Creative Commons BY-NC-ND 4.0-US |
en_US |
dc.subject |
Cenozoic |
en_US |
dc.subject |
Volcano |
en_US |
dc.subject |
Owyhee |
en_US |
dc.subject |
Miocene |
en_US |
dc.subject |
Paleozoic |
en_US |
dc.subject |
Pleistocene |
en_US |
dc.title |
Cenozoic Stratigraphy of the Owyhee Region, Southeastern Oregon |
en_US |
dc.type |
Article |
en_US |
dcterms.publisher |
Museum of Natural History,
University of Oregon |
|