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 55 for “"Denudation"”.
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Understanding Himalayan denudation at the catchment and orogen scale
Understanding the rates and processes of denudation is key to unraveling the dynamic processes that shape active orogens. This includes decoding the roles of tectonic and climate-driven processes in the long-term evolution of high- mountain landscapes in regions with pronounced tectonic activity …
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Denudation processes in a tectonically active rift on different time scales
… Kenya Rift. (2) 10Be-derived catchment-wide mean denudation rates from the northern, central and southern rift that characterize erosional processes on millennial to present-day timescales; and (3) paleo-denudation rates in the northern rift to constrain climatically controlled shifts in …
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Denudation rates and geomorphic evolution of the Cape Mountains, determined by the analysis of the in situ-produced cosmogenic 10BE
… from beneath 2-7 km of overburden by large-scale denudation processes affecting the subcontinent during Gondwana break-up (ca. 140 – 65 Ma). Despite its antiquity and location on a passive continental margin, the ruggedness of the present-day topography of the Cape Mountains compares to that of …
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From phantom blocks to denudational noise
… evolution. Modern methods for estimating denudation rates enable us to quantitatively express and compare processes of landscape downwearing that can be traced through time and space—from the seemingly intact, though intensely shattered, phantom blocks of the catastrophically fragmented …
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The post-breakup evolution of the western Indian high-elevation passive margin
… record of the timing and magnitude of Cenozoic denudation along the continental margin. This study presents an analysis of sedimentation in the Konkan-Kerala basin, coupled with a mass balance study, in order to test competing conceptual models for the development of the Western Indian margin. …
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Quantifying South African uplift : using apatite fission track thermochronology and offshore sediment volumes to test the balance between denudation (onshore) and deposition (offshore) since Gondwana break-up
Includes bibliographical references (leaves 201-217).
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Single grain detrital cosmogenic Ne-21 analysis: a new tool to study long-term landscape evolution
… estimate time and space-averaged catchment-wide denudation rates, but have the potential to offer considerably more. This is because each grain leaving a catchment has a potentially unique history of erosion, transport and storage, and so the frequency distribution of cosmogenic nuclide …
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Hillslope erosion and weathering rates in Earth's most rapidly uplifting mountains
… erosion and soil production are the principle denudation processes in high-relief terrain, but quantitative estimates of landslide erosion on spatial and temporal scales relevant to landscape evolution are lacking, and there have been no prior measurements of soil production and weathering …
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Heilungsverlauf der Entnahmestelle von freien Schleimhaut- und Bindegewebstransplantaten im Gaumen : eine histologische und histometrische Studie am Affen
… und freien Bindegewebstransplantaten unter Denudation des Knochens histologisch und histometrisch näher zu beschreiben. Die Untersuchungen wurden an ausgewachsenen Langschwanzmakaken (Macaca fascicularis) durchgeführt. Die Entwicklung von Granulationsgewebe, Epithel und Bindegewebe und die …
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Evaluating in situ Grazing Patterns of Lytechinus variegatus and their Effects on Seagrass Beds of Thalassia testudinum
… beds at high densities. Outside of these denudation events, the effects of sea urchins on seagrass are poorly understood. This study examines the effects of <em>L. variegatus</em> on <em>T. testudinum</em> in situ, to understand how sea urchins are affecting seagrasses <em>in situ</em>. …
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Dynamic topography of the western Great Plains : geomorphic and 40Ar/39Ar evidence for mantle-driven uplift associated with the Jemez lineament, New Mexico and SE Colorado
… the Raton-Clayton volcanic field and to quantify denudation rates from flow-capped paleosurfaces. Several datasets indicate patterns of surface topography that are consistent with dynamic rock uplift along a NE-trending flexural bulge above the Jemez low-velocity mantle anomaly, but are not …
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Climatic variation, solute concentration and solute flux in meltwaters draining from an alpine glacier
Cationic denudation rates in glacierised basins are considerably higher than the global mean. High specific discharge coupled with rapid dissolution of finely-divided sediment produced by glacial erosion results in high solute flux levels in rivers draining glacierised basins. As solute cc …
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Kinematic Evolution, Metamorphism and Exhumation of the Greater Himalayan Sequence, Mount Everest Massif, Tibet/Nepal
… Plateau and the Indian plate, and focused denudation on the range front. Although the general geometry and shear sense criteria for these bounding shear zones has been documented, prior to this investigation, relatively few attempts had been made to quantify the spatial and temporal …
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Structural, thermal, and geomorphic evolution of the eastern margin of the Tibetan Plateau
… on the long-term rates and distribution of denudation across this margin of the plateau. Results indicate that 1) prior to the Late Miocene (ca. 11 Ma) regional denudation rates were low (< 0.1 mm/yr), and 2) rocks adjacent to the plateau margin were exhumed from depths of 8-10 km since that …
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A Thermochronological Investigation of Orogenic Architecture, Kinematics, and Tectonic-Climatic Interactions within the St. Elias Orogen, Alaska
… and demonstrate an association between glacial denudation and orogenic evolution. These data show that exhumation and deformation within the St. Elias orogen are focused across a thin-skinned fold and thrust belt on the windward flank, whereas the leeward flank functions as a deformational …
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Timing of erosional episodes in the Marble Canyon and Vermilion Cliffs region from apatite (U-Th)/He thermochronology
… that postulate SW 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) …
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A Glacial Sedimentary System in Northwest Spitzbergen
… marine sediments, or in terrestrial moraines. Denudation rates calculated from lacustrine sediment accumulation infer the presence of smaller glaciers in Signedalen during the Younger Dryas than at present. The early to mid Holocene appears to have been characterised by relatively warm …
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Geomorphology of the Cape Peninsula
… of changes wrought in the past in tho form of denudation or erosion surfaces, the relationship between the underlying geological structure and present landforms, together with the strong structural and directional control which is manifested within the study area. Present drainage patterns are …
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Die neogene Hebungsgeschichte der Patagonischen Anden im Kontext der Subduktion eines aktiven Spreizungszentrums
… einschneidet. Dies bedeutet, dass aufgrund der Denudation im andinen Orogen erste Sockelgesteinseinheiten in den Bereich der Abtragung gelangen und dass dieser Eintrag um 12 bis 10 Ma ein Volumen einnimmt, das zu signifikanten Änderungen der Gesamtgesteinsgeochemie der Vorlandsedimente führt. …
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