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dc.contributor.advisorEllison, Samuel P., 1914-1999
dc.creatorBoyle, Walter Victor, 1931-en
dc.date.accessioned2011-08-25T21:10:07Zen
dc.date.available2011-08-25T21:10:07Zen
dc.date.issued1955-05en
dc.identifier.urihttp://hdl.handle.net/2152/13329en
dc.descriptiontexten
dc.description.abstractThe Middle-Ordovician Simpson group, deposited in a shallow epicontinental sea, is composed of a sequence of interbedded limestone, shale, and smaller amounts of sandstone. By means of electric and radioactivity logs the group is divided into eight zones traceable across Pecos County, except for its absence, over the Fort Stockton uplift area, caused by post-Simpson erosion. Each zone thins persistently eastward toward the Texas Peninsula, which separated the West Texas basin from the Oklahoma basin of deposition. A northwestward increase in sand content of each zone indicates that the source area for the sand was to the northwest. In Pecos County oil is produced from the Simpson at present in only a small north-central area.en
dc.format.mediumelectronicen
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subjectGeology, Stratigraphic--Ordovicianen
dc.subjectGeology--Texas--Pecos Countyen
dc.titleSimpson group, Pecos County, Texasen
dc.description.departmentGeological Sciencesen
thesis.degree.departmentGeological Sciencesen
thesis.degree.disciplineGeological Sciencesen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Artsen


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