Structural geology of the southern Silurian hills, San Bernardino County, Calif

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dc.contributor.advisorBurchfiel, B. Clark
dc.creatorAbbott, Earl, 1942-
dc.date.accessioned2016-04-22T21:58:30Z
dc.date.available2016-04-22T21:58:30Z
dc.date.issued1971
dc.description.abstractIn the southern part of the Silurian Hills, seven lithologic units are delineated. They are an earlier Precambrian gneiss complex, the later Precambrian Pahrump Group, a Precambrian (?) metasedimentary complex, a Precambrian (?) metadioritic and metasedimentary complex, the Riggs Formation, basic plutonic rocks, and acidic plutonic rocks. Metamorphism reaches high greenschist to low amphibolite grade with an overprint of contact metamorphism caused by the intrusion of the acidic plutonic rocks. The Riggs thrust fault separates the Pahrump Group, which is in the lower plate, from all of the other units. The upper plate rocks show a more complex folding history than the lower plate rocks. Two quite different types of movement have occurred along the Riggs thrust. The first occurred in late Mesozoic time, was a compressional event, moved in a north or northeast direction, formed a sharp contact with plastic deformation rather than brecciation, and can be seen in the southern Silurian Hills. The second occurred in the Tertiary, was a gravitational event, moved south, formed a chaos structure in the lower plate, and can be seen in the northern Silurian Hills.
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent59 ppen_US
dc.identifier.callnoThesis Geol. 1971 Abbotten_US
dc.identifier.citationAbbott, Earl, 1942-. "Structural geology of the southern Silurian hills, San Bernardino County, Calif." (1971) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89785">https://hdl.handle.net/1911/89785</a>.
dc.identifier.digitalRICE0817en_US
dc.identifier.urihttps://hdl.handle.net/1911/89785
dc.language.isoeng
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.
dc.titleStructural geology of the southern Silurian hills, San Bernardino County, Calif
dc.typeThesis
dc.type.materialText
thesis.degree.departmentEarth Science
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts
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