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dc.contributor.advisorKerans, C. (Charles), 1954-en
dc.contributor.advisorZahm, Christopher Kenten
dc.contributor.committeeMemberSteel, Ronen
dc.creatorEldam, Nabiel S.en
dc.date.accessioned2012-07-20T14:20:06Zen
dc.date.accessioned2017-05-11T22:26:15Z
dc.date.available2012-07-20T14:20:06Zen
dc.date.available2017-05-11T22:26:15Z
dc.date.issued2012-05en
dc.date.submittedMay 2012en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2012-05-5134en
dc.descriptiontexten
dc.description.abstractThis study provides new insights on the mechanisms that controlled the development of solution-enhanced fractures and suprastratal deformation associated with the Mississippian Madison Sequence IV evaporite paleokarst complex. Based on detailed field mapping utilizing LiDAR, GPS, and field observations, we document a paleostructural high (oriented 145º) associated with the Ancestral Rockies uplift within the study area. One hundred twenty-one sediment-filled, solution-enhanced fractures within the Seq. IV cave roof were mapped and characterized by their dominant fill type (Amsden or Madison) and vertical extent. Spatial analysis reveals minimum spacing of these features occurs in areas uplifted during the Late Paleozoic suggesting a link between paleostructural position and solution feature spacing. Shape analysis of these solution features also supports structural position during the Late Paleozoic acted as a dominant control on fracture morphology: (1) downward tapering and fully penetrative features concentrate in areas that experienced uplift; (2) upward tapering concentrate in areas that were undeformed. Mapping of Seq. IV cave roof strata demonstrates vertical collapse variability exceeds 22 m and fault intensity increases in areas of increased collapse. These findings have significant implications for prediction and characterization of solution-enhanced fractures and suprastratal deformation within evaporite paleokarst systems.en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.subjectEvaporite paleokarsten
dc.subjectFracturesen
dc.subjectBighorn Basinen
dc.subjectKarsten
dc.subjectMississippianen
dc.subjectMadisonen
dc.subjectTectonicsen
dc.subjectAmsdenen
dc.subjectHorseshoe shale memberen
dc.subjectRanchester memberen
dc.subjectLidaren
dc.subjectStratigraphic modelingen
dc.titleStructural controls on evaporite paleokarst development : Mississippian Madison Formation, Bighorn Canyon Recreation Area, Wyoming and Montanaen
dc.description.departmentGeological Sciencesen
dc.type.genrethesisen
dc.date.updated2012-07-20T14:22:20Zen
dc.identifier.slug2152/ETD-UT-2012-05-5134en


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