Global ETD Search
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 66 for “"eolian"”.
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Eolian morphosyntax: A comparative Romance perspective
… of the southern Italo-Romance variety of Eolian, spoken in the archipelago of the Eolian Islands. Its recent origin and hybrid-style grammar, described in previous studies, leads to an exploration of its morphosyntactic similarities to the two macro-groups of southern Italian dialects, the …
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Three-dimensional eolian bounding surface architecture of the Entrada sandstone, Utah: expanding our understanding of reservoir heterogeneity in wet eolian systems
Eolian bounding surfaces represent significant changes in dune-field dynamics caused by allogenic and autogenic processes associated with erg evolution. Eolian deposits form noteworthy petroleum reservoirs (e.g., Norphlet Formation, Rotliegend Group, and the Tensleep Sandstone), but bounding …
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Reconstructing atmospheric changes in Monsoon regions using eolian dust
… millennial timescales. This thesis generates new eolian dust records from two monsoon regions to reconstruct changes in atmospheric circulation in response to forcing by high-latitude insolation and boundary condition change. In Chapters 2 and 3 I use 230Thxsnormalization to construct …
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Reconstructing atmospheric changes in monsoon regions using eolian dust
… millennial timescales. This thesis generates new eolian dust records from two monsoon regions to reconstruct changes in atmospheric circulation in response to forcing by high-latitude insolation and boundary condition change. In Chapters 2 and 3 I use ²³⁰Thxs-normalization to construct …
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Dust and Pleistocene Ice Ages: Eolian Sediments and Climate Change at Ziegler Reservoir, Snowmass Village, Colorado
… mineralogy, and geochemistry indicate eolian processes were the likely mechanism for deposition of the local, silt-rich and clay-rich sediments that ultimately filled the basin. The presence of clay-rich units (up to three-times more clay than background), is interpreted to represent …
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Late Quaternary semiarid eolian system dynamics : distribution, timing, and soil geomorphic controls, Black Mesa, northeastern Arizona, USA
… previously unstudied topographically-controlled eolian deposits and older ages for sand sheets than were reported by previous investigators. Chapter 2 focuses on the distribution, age, and geomorphic implications of topographically-controlled eolian deposits on Black Mesa. Chapter 3 describes the …
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Reaktivation and stabilization phases of eolian deposits under climatic and anthropogenic influences in the Rolling Plains of Texas, U.S.A.
… warming period. This study identifies major eolian anthropogenic and climatic reactivation and stabilisation phases in the Rolling Plains of Texas during the Holocene, but also ties them into the existing Southern High Plains and Great Plains climatic record. This study also researched the …
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Geomorphic Consequences of Hydroelectricity and Transportation Development near Celilo Falls, Lower Mid-Columbia River, Washington
… and hydroelectricity developments to eolian landforms on the floodplains and adjoining slopes have not been studied. Focusing on 2,800 acres near Celilo Falls, this study 1) establishes a baseline condition of eolian landforms from 1805 to 1900; 2) conducts an air photo increment …
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Eolian Landscape History and Prehistoric Dune Farming in Petrified Forest National Park: A Geoarchaeological Approach to Understanding the Long-Term Use of a Marginal Landscape
… understand human-environment interaction in the eolian landscape in Petrified Forest National Park, Northeast Arizona. The Petrified Forest National Park is located along the southern end of an extensive sand sheet. This landscape was inhabited by Ancestral Pueblo people from at least A.D. …
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Late Quaternary sedimentary architecture and depositional history of the Monahans Dune Field, Winkler County, TX.
The Monahans dune field is a Quaternary eolian system on the Southern High Plains in west Texas. Previous work characterizing the Monahans is limited by the depth and spatial coverage of stratigraphic analyses. This study presents the initial results of an ongoing study of the dune system …
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The Broom Creek Formation (Permian), in southwestern North Dakota: depositional environments and nitrogen occurrence
… </p><p> The major lithofacies identified are, 1) eolian Cores sandstone, 2) nearshore marine sandstone, and 3) marine carbonate. From the sandstone-dolostone distribution, marine predominance existed in the eastern part of the study area and eolian predominance in the west during the deposition of …
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Characterization of clasts in the Glen Torridon region of Gale crater observed by the Mars Science Laboratory Curiosity Rover
… distances. Several clast types exhibit signs of eolian abrasion, such as facets, pits, flutes and grooves. These results indicate that clasts are the products of bedrock degredation followed by extensive eolian wear.
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A multidisciplinary approach to reservoir characterization of the coastal Entrada erg-margin gas play, Utah
… These high quality reservoirs are dominated by eolian-influenced facies interbedded with sandy interdune facies. They are sealed vertically by muddy and silty facies of associated tidal flat deposits that act as excellent stratigraphic traps in the subsurface. A variety of approaches were used …
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The Neoproterozoic São Francisco Basin, central Brazil: tectonic evolution, paleoclimate, and mineral systems
… during the Cryogenian glaciations and subsequent eolian, oceanward, transport of silt and clay particles. Copious eolian dust is interpreted to have fertilized the surface ocean to stimulate primary productivity, increase photosynthetic oxygen, and contribute to atmospheric oxygenation. Combined …
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Reservoir Characterization and Outcrop Analogs to the Navajo Sandstone in the Central Utah Thrust Belt Exploration Play
… analogue for this developing play and other eolian reservoirs worldwide. There are eight facies within the Navajo Sandstone in the Justensen Flat/Devils Canyon area based on differences in primary and secondary sedimentary structures, sedimentary texture, petrology, porosity/permeability, and …
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Depositional and Diagenetic History of the Permian Unayzah A Reservoir, South Haradh, Saudi Arabia with Implications for Deep Gas Exploration and Development
… on the scale of 5 meters or less, of eolian dune, sand sheet, interdune and ephemeral (playa) lake facies. Diagenetic products in Unayzah A developed during a continuum of eogenetic and mesogenetic reactions. Early or eogenetic cements are dominated by clay rims that formed at …
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Facies and provenance analysis of the Midcontinent Rift System (MRS) in Kansas
… into six different facies associations (fluvial, eolian, mudflat/lake margin, lacustrine, alluvial fan, and fan delta). Overall, the studied succession comprises continental deposits laid down dominantly in alluvial and eolian settings, with the intermittent development of lacustrine systems. …
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Fluvial processes, beaver activity, and climate in the greater Yellowstone ecosystem and rock type control on hillslope morphology and soil development in the Sandia Mountains, New Mexico
… of coarse colluvium that traps and preserves eolian material. Accretion of eolian material along these slopes limits runoff and prevents attainment of a steady-state balance between soil production and downslope transport.
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Cross-Bedding
… and channel fills, beaches, sand dunes, and as eolian deposits modifying any of the others. It ranges in size from microscopic to tens of yards thick. Ripple-marks are considered to be miniature dunes. The most important uses of cross-bedding are as a top and bottom indicator and as a current …
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Soil geomorphology of the eastern Sevilleta Long Term Ecological Research Site
… and palygorskite occurs in old soils formed in eolian fines. Pedologic and mineralogical data indicate that palygorskite formed by transformation of dust-borne, aluminum-rich minerals, and that sepiolite subsequently formed by transformation of palygorskite. The association of these two …
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