The Lower to Middle(?) Jurassic Dunlap Formation, west-central Nevada: Deposition in actively extending half-graben basins

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dc.contributor.advisorOldow, John S.en_US
dc.creatorBartel, Richard Lynnen_US
dc.date.accessioned2009-06-04T00:23:05Zen_US
dc.date.available2009-06-04T00:23:05Zen_US
dc.date.issued1994en_US
dc.description.abstractAutochthonous Lower Jurassic synorogenic strata (Dunlap and Water Canyon Formations) in the Pilot and Excelsior Mountains of west-central Nevada were deposited in actively extending half-graben basins. Northwest-trending syndepositional faults and rapid lateral variations in sedimentary facies from southwest to northeast indicate that the basins were northwesterly elongated. Mean northward paleotransport data indicates basins opened to the north. Sand-rich facies were funnelled northwestward down the axis of the basins by subaqueous tractive processes, whereas gravel-rich facies were shed northeastward by submarine fans which formed along the southwestern margins of the basins. Regional stratigraphic and petrographic evidence indicate that several basins existed, and that individual basins were isolated or poorly connected during deposition. Deposition of the Lower Jurassic Dunlap and Water Canyon Formations within half-grabens is in marked contrast to previous interpretations equating basin formation to mid-Mesozoic contraction. Dunlap sedimentation unequivocally predates the formation of Mesozoic folds and thrusts and cannot be used to date the onset of regional shortening. Synorogenic deposition of Lower Jurassic rocks in northwest-trending basins is consistent with widespread extensional systems in the western Great Basin, the Sierra Nevada and the Mojave.en_US
dc.format.extent208 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS GEOL. 1994 BARTELen_US
dc.identifier.citationBartel, Richard Lynn. "The Lower to Middle(?) Jurassic Dunlap Formation, west-central Nevada: Deposition in actively extending half-graben basins." (1994) Diss., Rice University. <a href="https://hdl.handle.net/1911/16705">https://hdl.handle.net/1911/16705</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/16705en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectGeologyen_US
dc.titleThe Lower to Middle(?) Jurassic Dunlap Formation, west-central Nevada: Deposition in actively extending half-graben basinsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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