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 17 of 17 for “"fluvial incision"”.
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Surface uplift, fluvial incision, and geodynamics of plateau evolution, from the western margin of the Central Andean plateau
… in the Southern Hemisphere. Studying canyon incision history as a proxy for surface uplift offers a promising route to understanding how climate and tectonics have interacted throughout the evolution of the Central Andean plateau. In this thesis, a combination of bedrock low-temperature …
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Cosmogenic dating of fluvial terraces in the Sorbas Basin, SE Spain
Long term fluvial incision spanning the Late Cenozoic is recorded in many fluvial systems around the world by terrace landform sequences. The incision manifests itself as inset sequences of river terraces which form terrace staircases. The timing of the onset of incision and the rate incision then …
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Fluvial influence on high-frequency sedimentary cycle geometry: The transition from strandplain to deltaic deposition in the Cretaceous Point Lookout Sandstone, San Juan Basin, Colorado
… during base-level fail in the absence of fluvial incision predicts many of the stratigraphic relationships observed in the field, and provides the best sequence stratigraphic model for deposition within the study area.
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Late Quaternary marine deposits, offshore central Texas: Processes controlling geometry, distribution, and preservation potential
… thick, aerially extensive shoreline deposits. Fluvial incision varied significantly during lowstand Stage 2. As the rate of base-level fall increased from Stage 3 to 2, low sediment supply rivers incised narrow, shallow channels with no deltaic deposition, whearas sediment bypass and deeper …
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Depositional systems, sequence architecture, and controlling factors of an Eocene stratigraphic sequence at Minfeng steep margin of Dongying depression, eastern China
… by significant erosion at basin margin by fluvial incision during lake latest contraction. The differential thickness and development of individual depositional systems in the three systems tracts are resulted from interplay between sediment supply and accommodation space. In the second …
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Bedrock channel response to tetonic, climatic and eustatic forcings
… a theoretical model for bedrock-channel incision based on shear stress using field data. The primary study area is a series of 21 small, coastal drainage basins in northern California, USA with known, varying rates and history of rock uplift. The initial application of a simple form of …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… on the genesis of a regionally correlative basal incision surface and the subsequent fill architecture of the informal middle member of the Eagle Formation. Three stratigraphic surfaces are traced continuously for up to 15 km and include the regressive surface of marine erosion (RSE), sequence …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… on the genesis of a regionally correlative basal incision surface and the subsequent fill architecture of the informal middle member of the Eagle Formation. Three stratigraphic surfaces are traced continuously for up to 15 km and include the regressive surface of marine erosion (RSE), sequence …
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Late Cenozoic uplift of southeastern Tibet
… product of landscape dissection and reduction by fluvial incision due to the presence of major rivers which drain this portion of the plateau and plateau margins. Although initial development of the erosion surface is likely diachronous, we propose that a continuous low-relief landscape existed at …
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Evaluation of Coupled Erosional Processes and Landscape Evolution in the Teton Range, Wyoming
… regime. The focus of erosion by glacial, fluvial, or mass wasting processes is highly sensitive to small changes in boundary conditions, therefore spatial and temporal variability can be high when observed over short time scales. This work evaluated methods for dissecting the history of …
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Late quaternary climate changes and landscape evolution in the Northwest Himalaya : geomorphologic processes in the Indian Summer Monsoon Domain
… River during strong monsoon phases prevents fluvial incision due to oversaturation the fluvial sediment-transport capacity. In contrast, weaker monsoons result in a lower sediment flux that allows incision in the low-elevation parts of the Sutlej River.
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Evolution of transient topography on passive margins: A study of landscape disequilibrium in the southern Appalachian Mountains
… forces behind localized episodes of accelerated incision and the associated rugged topography have been difficult to explain given the absence of tectonic uplift. This study uses previously undocumented relict fluvial gravels and knickpoint location to confirm the role of drainage rearrangement …
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Quaternary to recent drainage evolution of the Rambla de Lucainena, SE Spain
… and active tectonics of this semi-arid area. Fluvial incision during the Quaternary has left a series of terrace fragments from which four important terrace groups have been identified. This study has taken a unique approach by integrating the analysis of contemporary process data and …
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Modelling surface evolution coupled with tectonics
… and the stream power law to reflect riverbed incision. The 1D SEC settles sediment that was produced by fluvial incision in the appropriate minimum, while the supply-limited 2D SEC DANSER uses a fast filling algorithm to model sedimantation. It is based on a cellular automaton. A …
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Investigating the Effects of Lithology on Landscape Evolution Processes across Scales
… underlying units from erosion and inhibiting fluvial incision, and therefore play an important role in preserving topography in the Valley and Ridge landscape, highlighting a specific mechanism by which lithology exerts an influence on topography in this setting. Second, I investigate the …
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Constraining tectonic and climatic controls on glacial/postglacial landscape evolution using numerical modeling
… caused repeated transitions between glacial and fluvial processes. During cold glacial periods, erosion and deposition by ice sheets and glaciers has left a clear imprint on Earth’s surface, creating unique landforms such as flat till plains, wide U-shaped valleys, steep mountain peaks, and deep …