Global ETD Search
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Showing 1 to 20 of 52 for “"Basin and Range"”.
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EASTERN BASIN AND RANGE CRUSTAL EXTENSION: A VIEW FROM SEISMOLOGY AND GEODESY
… the crustal structure of the eastern Basin and Range Province in the western United States and its relationship with the present-day extensional regime governing this region. The use of combined results from different geophysical methods provide a better understanding of the subsurface …
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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, bombs and …
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Crustal structure and evolution beneath the Colorado Plateau and the southern basin and range province
… P-to-S receiver functions recorded at 72 USArray and 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 …
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Three-dimensional magnetotelluric modeling and inversion with applications to the California Basin and Range Province
… of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Style of volcanism and extensional tectonics in the eastern Basin and Range Province: Northern Mohave County, Arizona
… boundary of the extensional allochthon in the Basin and Range Province and the eastern limit of exposure of mid-Tertiary igneous rocks at the latitude of Lake Mead. The upper plate of this fault system is exposed only in the northern White Hills, Mohave County, Arizona. The upper plate contains …
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Petrogenesis of Late Cenozoic alkalic basalt near the eastern boundary of the Basin-and-Range: Upper Grand Wash Trough, Arizona and Gold Butte, Nevada
Geochemical, isotopic, paleomagnetic, and geochronological studies of Late Miocene to Pliocene alkalic basalt in the upper Grand Wash Trough, Arizona and at Gold Butte, Nevada may place constraints on the petrogenetic history of the basalt and on the geometry of the crustal structures that may have …
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Structural Analysis of Ernst Tinaja Canyon Focusing on Strike-Slip Faulting and Folding, Big Bend National Park, Texas
<p>Basement and cover rocks in the Sierra Del Carmen Mountains in eastern Big Bend National Park were affected by multiple tectonic events. The Big Bend/Trans-Pecos area experienced shearing during Precambrian formation of the Texas Lineament, compression during the Paleozoic Ouachita-Marathon …
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Correlation of earthquakes with seismogenic faults along the Northern Arizona Seismic Belt, southwestern margin of the Colorado Plateau.
… of the most seismically active areas in Arizona, and extends from 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 …
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Imaging the mantle in southwestern, Utah using geochemistry, and geographic information systems
… is common in the 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 …
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Heat flow and heat production studies in North Dakota
… new heat flow determinations in North Dakota range from 0.6 to 1.9 HFU. The majority of heat flow measurements were completed for southwestern North Dakota. </p><p>Heat flow measurements were made in both oil and water wells. Heat production data from basement rocks when used in conjunction …
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Stratigraphic and structural evolution of the early Diligencia Basin, Orocopia Mountains, Southeastern California
… continental siliciclastic sedimentary rocks and intercalated basaltic lavas, located in the eastern Orocopia Mountains of southeastern California. These deposits exhibit characteristics which may link them to tectonic processes diagnostic of both the Basin and Range physiographic province of …
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Geology of the Northern Alto Relex Area, Big Bend National Park, Brewster County, Texas
… scarp. Cretaceous rocks in the area were folded and faulted by Laramide compression, intruded by Tertiary sills and overprinted by high-angle normal faults from Basin and Range extension. During the Laramide Orogeny and Basin and Range extension, the underlying basement shear zone called, the …
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Characterization of a blind geothermal prospect through LiDAR analysis and shallow temperature survey, Gabbs Valley, Nye and Mineral Co., NV
… is located in west-central Nevada within the Basin and Range province at the transition between NW directed dextral shear in the Walker Lane and WNW-ESE extension in the Basin and Range. The tectonics at the prospect site were investigated using Quaternary fault mapping from LiDAR and low …
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Documenting the Earthquake History of the Thousand Springs Fault in Summer Lake Basin, Oregon, USA
… low-strain-rate regions such as the northwestern Basin and Range can be difficult due to the infrequency of earthquakes. Revealing the earthquake records of low-strain-rate regions can refine our understanding of the variability of earthquake sizes and recurrence intervals, however, which can …
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Structural Analysis of the Northwest Wind Mountain Quadrangle, New Mexico: Proterozoic Shearing to Cenozoic Brittle Faulting in the Burro Mountains
… prompting detailed (1:12,000) geologic mapping and collection of structural data. The study area has a complex tectonic history, including 1) ~1.65 Ga metamorphism during accretion of the Mazatzal terrane to Laurentia’s southern margin; 2) ~1.4 Ga intrusion of Granite and Rhyolite Province …
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Structural Controls of the San Emidio Geothermal System, Northwestern Nevada
… geologic analyses integrated with geophysical and well data have provided insight into the kinematics, stress state, and structural controls of the San Emidio geothermal system. San Emidio lies within the Basin and Range province of northwestern Nevada, ~100 km north-northeast of Reno. The San …
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Geologic Mapping along the Benton Spring Fault, Nevada: Dextrally-offset Tuff-filled Paleovalleys in the Central Walker Lane
… faults, straddles the western edge of the Basin and Range Province and the eastern edge of the Sierra Nevada. In the Gabbs Valley Range, central Nevada, eastern Central Walker Lane, I combine new mapping, geochronology, and structural studies to document the geometry and timing of dextral …
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Vegetation Variability and Its Hydro-Climatologic Dependence
… as topography, soil properties, vegetation type, and climate variations (e.g., the El Nino Southern Oscillation [ENSO]), and to synthesize this understanding for future predictive modelling applications. The initial phase of this study examines how topographic variability moderates the …
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Unresolved Problems Involving the Hydrogeology and Sequence Stratigraphy of the Wasatch Plateau based on Mapping of the Wattis 7.5 Minute Quadrangle, Carbon and Emery Counties, Utah: Insights Gained from a New Geologic Map
… central Utah, in the transition zone between the Basin and Range province and the Colorado plateau. Two small grabens, located in the quadrangle, are the easternmost evidence of Basin and Range faulting. Sedimentary units exposed are mainly Cretaceous in age and deposited in the Western Cretaceous …
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Depositional history of the Black Mountain conglomerate, Mohave County, Arizona: Sedimentary response to Miocene extension
This study documents the Miocene depositional and extensional history for the area west of Wilson Ridge in the Black Mountains, northwestern Arizona. The field area, part of the Basin and Range province, lies within an area that experienced northward migration of intense volcanism several million …
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