The Geology and Paleontology of Coglan Buttes, Oregon

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dc.contributor.advisorHopkins, Samanthaen_US
dc.contributor.authorMacKenzie, Kristenen_US
dc.date.accessioned2013-10-03T23:33:24Z
dc.date.issued2013-10-03
dc.description.abstractThe outcrops of Coglan Buttes in southern Oregon are composed of numerous distinct sedimentary sandstone and volcaniclastic beds. In the past it has been mapped as a single Miocene sedimentary unit. Though the area was known to have produced vertebrate fossils, they had not been studied. My research presented here is the first in-depth study of both the geology and the paleontology of the area. The 620 meters of interbedded sandstones, pyroclastic deposits and volcanic sheet flows change in lateral thickness; they indicate significant paleotopography. In addition I describe the vertebrate assemblages contained within these geologic units and compare them with other North American assemblages. The Coglan Buttes faunas share affinity to those of the John Day Basin assemblages in part, as well as with southern latitude faunas of California, Florida and Texas. The faunal composition of the Coglan Buttes assemblage indicates an earliest Miocene (late Arikareean) age.en_US
dc.description.embargo2015-10-03
dc.identifier.urihttps://hdl.handle.net/1794/13268
dc.language.isoen_USen_US
dc.publisherUniversity of Oregonen_US
dc.rightsAll Rights Reserved.en_US
dc.subjectArikareeanen_US
dc.subjectBasin and Rangeen_US
dc.subjectborophagineen_US
dc.subjectcameliden_US
dc.subjectmylagauliden_US
dc.subjectpyroclastic density currenten_US
dc.titleThe Geology and Paleontology of Coglan Buttes, Oregonen_US
dc.typeElectronic Thesis or Dissertationen_US
thesis.degree.disciplineDepartment of Geological Sciencesen_US
thesis.degree.grantorUniversity of Oregonen_US
thesis.degree.levelmastersen_US
thesis.degree.nameM.S.en_US

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