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 18 of 18 for “"Geomorphic Evolution"”.
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Structural, thermal, and geomorphic evolution of the eastern margin of the Tibetan Plateau
… investigates the development and subsequent evolution of the topographic margin of the plateau in an effort to ascertain the controls on and geodynamic significance of present day topography. The primary results from this study are threefold, and include: 1) an estimate of the inception of …
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Cenozoic tectonic and geomorphic evolution of the Red River Region, Yunnan Province, China
(cont.) Xianshuihe-Xiaojiang fault system during growth of the southeast plateau margin. Cosmogenic ²⁶A1 and ¹⁰Be basin-wide erosion rate and burial ages indicate a background incision rate of [approximately] 0.05 to 0.10 mm/a, lower than the long-term incision rate minimum of [approximately] 0.26 …
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A Comparative Analysis of the Subsurface Stratigraphic Framework to the Geomorphic Evolution of the Caillou Bay Headland, South-Central Louisiana
… distribution of different sedimentary units. The geomorphic evolution as indicated by maps was then evaluated in order to locate patterns of shoreline change and wetland loss for the headland. Land loss maps developed were overlain on lithosome contour maps to calculate amounts of land loss …
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Denudation rates and geomorphic evolution of the Cape Mountains, determined by the analysis of the in situ-produced cosmogenic 10BE
… structural grain inherited from the CFB. The evolution of this landscape is poorly understood, because little quantitative data exists on the denudation history of the Cape Mountains. This study presents the first in situ-produced cosmogenic 10Be inventories determined for quartz from …
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Perspectives on the Geomorphic Evolution and Ecology of Modified Channels and Two-Stage Ditches in the Agriculturally-Dominated Midwestern United States
… water chemistry, spatial distribution, and geomorphic features within a predominantly agricultural watershed in Ohio using Canonical Correspondence Analysis (CCA) and variance partitioning to relate environmental variables to fish and macroinvertebrate community attributes. At 32 sites in …
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Neotectonics Study Along The Frontal Thrust System Of The Fold-Thrust Belt Of Northwest Himalayas, Pakistan
… well data to constrain the structural geometry, geomorphic evolution, and active tectonic deformation of the Himalayan Frontal Thrust System. The first study focuses on the westernmost segment of the Himalayan frontal thrust in the Manzai Ranges. The geologic landscape shows active tectonic …
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Geomorphology of the Cape Peninsula
… can be explained only in the context of geomorphic evolution. This is generally acceptable since today is tho child of yesterday and the father of tomorrow. Other aspects which are examined include evidence of changes wrought in the past in tho form of denudation or erosion surfaces, the …
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Quarternary Alluvial Deposition in the Upper Green River Valley, Kentucky
… describes the alluvial deposits and Quaternary geomorphic evolution of the Upper Green River in Kentucky by documenting the nature of flood plain sediments at two sites along the valley bottom of the Upper Green River between Mammoth Cave National Park and Green River Lake. Field methods …
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Neogene and Quaternary Events Shaped Diversification and Speciation in Bhutanese Rheophilic Fishes of the Family Nemacheilidae (Cypriniformes) and Sisoridae (Siluriformes)
… and speciation in both study groups reflect the geomorphic evolution of the Himalaya/QTP. My results indicate Bhutanese drainages maintain undiagnosed variation that is allocated to species-groups within each family.</p>
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An Approach to Modelling Ice Deposition Across the Solar System
… of MIDAS on Mars: the first examines the geomorphic evolution of Mt. Sharp (Aeolis Mons) in Gale Crater, where observations by the Mars Science Laboratory Curiosity rover reveal bedrock features resembling terrestrial glacial landforms. Using MIDAS, three-dimensional flow of cold-based, …
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Pliocene-Pleistocene landscape evolution in south-central Chile : interactions between tectonic, geomorphic, and climatic processes
… between climate and tectonics. Thus, the geomorphic characteristics of a landscape can only be understood if both, climatic and tectonic signals of past and ongoing processes can be identified. In order to evaluate the impact of both forcing factors it is crucial to quantify the evolution …
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Fluvial sedimentation in continental half-graben basins
… approaches. Physical experiments focused on the geomorphic evolution of drainage and the resulting stratigraphic architecture in an asymmetrically subsiding basin based on the form of a simple half graben with four interacting supply points of sediment and water that produced an axial fan and …
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Multi-Scale detection, mapping, and modelling geomorphic change in gravel-bed rivers with UAV remote sensing
… scales, providing an ideal perspective for geomorphic process interpretation. For a historically modified UK case study, four series of very high resolution DEMs (digital elevation model) and orthomosaic imagery are produced for a 2km reach of quasi-wandering gravel-bed river. Comparative …
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Palaeoenvironmental reconstruction in South Africa's year-round rainfall zone using multiproxy geochemical analyses on lake sediments from Swartvlei
… the top half of the core marks Swartvlei’s evolution into more lacustrine conditions and its separation from Groenvlei during the same period. A more humid climate is further inferred from organic proxies that indicate a greater in-wash of vascular vegetation during this period, as well as …
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Unifying multi-source data and modeling perspectives to investigate connectivity and material transport in coastal river deltas
… important implications for understanding the eco-geomorphic evolution of deltas, and our modeling framework could have interdisciplinary implications for studying the transport of materials in other systems, including sediments, nutrients, wood, plastics, and biotic materials. In the third study, …
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Neotectonics & Cooling History of the Southern Patagonian Andes
… dynamics, magmatism, and the structural and geomorphic evolution of the overriding plate. The Southern Patagonian Andes of South America are a prime example for sustained oceanic ridge collision and the successive formation and widening of an extensive asthenospheric slab window since the …
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Late Quaternary landscape evolution and environmental change in Charwell Basin, South Island, New Zealand
… holistic analysis of late Quaternary landscape evolution and environmental change in Charwell Basin using terrain analysis, loess stratigraphy, soil chemistry and paleoecological data. The study contributes new understanding of New Zealand landscape and ecosystem responses to regional and global …
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Uplift history and geomorphic development of the Southern Alps, New Zealand, assessed by fission track analysis
The uplift history and geomorphic development of the Southern Alps has been studied, using fission track analysis of basement samples in combination with measurement of the present geomorphology of the Southern Alps. During the late Cenozoic the Pacific plate has been converging obliquely with the …