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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"Colorado Plateau"”.
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Biogeography of Montane Mammals on the Colorado Plateau and Adjacent Regions
… small mammal communities on mountains of the Colorado Plateau and adjacent regions. Forty six isolated ranges were characterized across a 5-state study area encompassing the Colorado Plateau, including the central high plateaus of Utah and the Basin and Range Province (i.e. the Great Basin and …
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Mafic volcanism in the Colorado Plateau/Basin-and-Range Transition Zone, Hurricane, Utah
… mafic volcanic field in the Colorado Plateau/Basin & Range Transition Zone located in the eastern part of the St. George basin in southwestern Utah. Strombolian-Hawaiian style eruptions produced thin (10 m) a'a lava flows and cinder (scoria) cones composed of vesicular basalt, …
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Identification, Mapping, Analysis, and Dating of Composite Mega Landslides in the Colorado Plateau
… complexes within the Grand Canyon region of the Colorado Plateau. This is a vast and remote region of rugged topography. The landslide complexes in this study are greater than 10 million cubic meters in volume. The slides are located within different areas of the region and consist of differing …
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Crustal structure and evolution beneath the Colorado Plateau and the southern basin and range province
… other broadband seismic stations placed on the Colorado Plateau and the SBRP in Arizona revealed systematic spatial variations in crustal Vp/Vs, crustal thickness and amplitude of P-to-S converted phases. Our results reveal that the BRP is characterized by a thin crust (28.2 ± 0.5 km), a mean …
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Correlation of earthquakes with seismogenic faults along the Northern Arizona Seismic Belt, southwestern margin of the Colorado Plateau.
… near Kanab in southernmost Utah to the Mogollon Plateau south of Flagstaff, Arizona. The NASB defines the seismic boundary between the Colorado Plateau and the Basin and Range Provinces. This research attempts to spatially correlate four M≥4.0 earthquakes that had epicenters in the Kanab-Fredonia …
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Multiscale Integration of Empirical Geologic Observations with Quantitative Structural Modeling to Constrain Late Cretaceous to Eocene Paleostress Environments on the Colorado Plateau
… to early Eocene deformation across the Colorado Plateau.The first part of this dissertation focuses on salt-related stress perturbations adjacent to the Salt Valley salt wall in the Paradox Basin of southern Utah. Under Late Cretaceous-early Eocene tectonic loading, the salt wall …
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Cenozoic potassic magmatism and uplift of the Western United States
… within the non-extensional, uplifted central Colorado Plateau and Sierra Nevada have been studied in detail and a general model is proposed for non-extensional, uplift-related, magmatism within the Western Cordillera. <br></br><br></br>The Oligo-Miocene potassic-ultrapotassic lamprophyres of …
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Syntectonic deposition and paleohydrology of the spring-fed Hualapai Limestone and implications for 5-6 MA integration of the Colorado River system through Grand Canyon : evidence from sedimentology, geochemistry and detrital zircon analysis
… Hualapai Limestone, at the western edge of the Colorado Plateau, provides the best sedimentary record available for 12 to 6 Ma at the mouth of the Grand Canyon. Because it directly underlies the first Colorado River gravels, this unit is a key element for understanding the integration of the …
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Imaging the mantle in southwestern, Utah using geochemistry, and geographic information systems
… transition zone from the Basin and Range to the Colorado Plateau. This study focuses on an 80 km long transect containing seven separate basalt fields spaced less than 20 km apart. The transect extends from eastern Nevada through northwestern Arizona and into southwestern Utah, across the crustal …
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Elevation, Longitudinal Profile, And Schmidt Hammer Analysis Of Strath Terraces Through Capitol Reef National Park, Utah: Bedrock Channel Response To Climate Forcing?
… that drainage development in this area of the Colorado Plateau was strongly dependent upon a regional-scale forcing mechanism (e.g. climate) rather than strictly independent basin-scale processes. Elevations of mapped strath terraces and their associated black volcanic boulder deposits were …
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A Multi-Millennial Drought Reconstruction for West-Central New Mexico Using Rocky Mountain Juniper (<i>Juniperus scopulorum</i>, Sarg.)
… within other hydroclimatic proxy records in the Colorado Plateau region spanning the time period (16<sup>th</sup> century and 2<sup>nd</sup> century megadroughts). By ranking the extreme drought events by magnitude, duration, intensity, and overall score, the most extreme drought events of this …
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Neotectonic evolution of Grand Canyon : interaction between volcanism, river incision, epeirogenic uplift, and faulting
… to constrain lithospheric modification of the Colorado Plateau margins. Buoyancy modification of the upper mantle, driven by the upwelling, is a likely driver for recent uplift of the area. In the second chapter, correlation between oversteepened rivers and areas of high-velocity upper mantle …
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Tectonic development of Proterozoic structures and their influence on Laramide and Miocene deformation, north Virgin Moutains, SE Nevada and NW Arizona
… straddles the boundary between the unextended Colorado Plateau and the highly extended crust of the central Basin and Range province. The anticline is 50 km long and 8 km wide, is doubly-plunging, and has overturned Paleozoic beds on both limbs. The crystalline core of the VMA is composed of …
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Systematics and biogeography of the Great Basin pocket mouse, Perognathus parvus
… across three geological regions: Columbia Plateau, Great Basin and Colorado Plateau. Limited ability of P. parvus to disperse over large areas and across areas of unsuitable habitat provide a foundation for studying biogeographic vicariance hypotheses related to its distribution. Vicariance …
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Stratigraphy And Depositional Environments Of Lower And Middle Cambrian Strata In The Lake Mead Region, Southern Nevada And Northwestern Arizona
… in southern Nevada and the western edge of the Colorado Plateau in northwestern Arizona. Nine intergradational lithofacies were distinguished based on a rich suite of sedimentary structures, including lenticular-, wavy-, and flaser-bedding, wrinkle marks, herringbone cross-stratification, …
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Calorespirometric Evidence for Adaptation of Blackbrush and Shadscale to Growth Season Temperatures in Cold Deserts
… often grow together in the Great Basin and the Colorado Plateau in the life zone between 800 and 2000 m elevation. Tissue and seeds from the two species were collected from several localities. Metabolic heat and carbon dioxide production rates were measured with calorespirometry on tissue from …
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Timing of erosional episodes in the Marble Canyon and Vermilion Cliffs region from apatite (U-Th)/He thermochronology
… to NE progressive denudational stripping of the Colorado Plateau via cliff retreat. The main goal is to evaluate the timing of carving of Marble Canyon. Thermal history models were generated using HeFTy for 14 samples that range in elevation from 940 m (river level) to 2052 m (top of the …
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Geometry and construction history of a complex intrusive center in the shallow crust, Mount Pennell, Henry Mountains, Utah
… intrusive centers are present on the Colorado Plateau. Mount Pennell is an asymmetric intrusive center in the Henry Mountains of southern Utah. Recent field work on the eastern flank of Mount Pennell reveals evidence of construction of a primary laccolith and subsidiary intrusions from …
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Parowan Pottery and Fremont Complexity: Late Formative Ceramic Production and Exchange
… culture located in the Eastern Great Basin and Colorado Plateau, have been primarily studied from an ecological perspective. This research addresses issues that are not ecological, the organization of production and exchange of ceramic vessels. Following criteria suggested by Brown et al. …
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Understanding topographic evolution of continents with landscape evolution simulations: the case of North America
… of western North American today, i.e., Wyoming, Colorado Plateau and the Rockies. Formation mechanisms of both the WIS and the subsequent uplift remain debated. In general, proposed mechanisms of continental-scale vertical motions can be categorized into: 1) isostatic topographic variation due to …
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