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Full-Text Articles in Physical Sciences and Mathematics
Stratigraphic Control Of Landscape Response To Base-Level Fall, Young Womans Creek, Pennsylvania, Usa, Roman A. Dibiase, Alison R. Denn, Paul R. Bierman, Eric Kirby, Nicole West, Alan J. Hidy
Stratigraphic Control Of Landscape Response To Base-Level Fall, Young Womans Creek, Pennsylvania, Usa, Roman A. Dibiase, Alison R. Denn, Paul R. Bierman, Eric Kirby, Nicole West, Alan J. Hidy
College of Arts and Sciences Faculty Publications
Landscapes are thought to respond to changes in relative base level through the upstream propagation of a boundary that delineates relict from adjusting topography. However, spatially-variable rock strength can influence the topographic expression of such transient landscapes, especially in layered rocks, where strength variations can mask topographic signals expected due to changes in climate or tectonics. Here, we analyze the landscape response to base-level fall in Young Womans Creek, a 220 km2 catchment on the Appalachian Plateau, USA underlain by gently folded Paleozoic sedimentary rocks. We measured in situ 10Be concentrations in stream sands from 17 nested watersheds, and used …
Speleogenesis In Turbulent Flow, Max P. Cooper
Speleogenesis In Turbulent Flow, Max P. Cooper
Graduate Theses and Dissertations
Existing models of speleogenesis neglect the shape of cross-sections, which can hold information related to climate, tectonics, and sediment supply in their widths. The first study of this dissertation simulates cross-sections of phreatic tubes, vadose canyons, and paragenetic galleries using a method developed for bedrock channels. Successful simulation of these cross-sections depends on erosion scaling with shear stress, in conflict with speleogenesis theory. Scaling of equilibrium width in paragenetic galleries was explored through analytical derivation and simulations, showing that width scales positively with discharge to the 1/2 power, and negatively with a weak power of sediment supply. Negative scaling of …
Lithologic Controls On Focused Erosion And Intraplate Earthquakes In The Eastern Tennessee Seismic Zone, Sean F. Gallen, J. Ryan Thigpen
Lithologic Controls On Focused Erosion And Intraplate Earthquakes In The Eastern Tennessee Seismic Zone, Sean F. Gallen, J. Ryan Thigpen
Earth and Environmental Sciences Faculty Publications
We present a new geomorphic model for the intraplate eastern Tennessee seismic zone (ETSZ). Previous studies document that the Upper Tennessee drainage basin is in a transient state of adjustment to ~150 m of base level fall that occurred in the Late Miocene. Using quantitative geomorphology, we demonstrate that base level fall resulted in the erosion of ~3,500 km3 of highly erodibility rock in an ~70 km wide by ~350‐km‐long corridor in the Paleozoic fold‐thrust belt above the ETSZ. Models of modern incision rates show a NE‐SW trending swath of elevated erosion ~30 km southeast of the center of …
Book Review - Let Us Now Praise Famous Gullies, Melissa E. Johnson
Book Review - Let Us Now Praise Famous Gullies, Melissa E. Johnson
Georgia Library Quarterly
No abstract provided.
An Evaluation Of Marsh Shoreline Erosion And Sediment Deposition In The Grand Bay National Estuarine Research Reserve, Mississippi, Usa, Joseph Terrano
An Evaluation Of Marsh Shoreline Erosion And Sediment Deposition In The Grand Bay National Estuarine Research Reserve, Mississippi, Usa, Joseph Terrano
USF Tampa Graduate Theses and Dissertations
Coastal marshes serve important ecologic and economic functions, such as providing habitat, absorbing floodwaters and storm surges, and sequestering carbon. Throughout the northern Gulf of Mexico, coastal marshes are disappearing due to wave attack, sea-level rise, sediment export, and subsidence. Marsh area increases when sediments accumulate at the marsh shoreline, accrete vertically, and when non-marsh areas are colonized by marsh vegetation. Marsh shoreline erosion results in net marsh loss when transgression rates at the marsh-water edge exceed upland-marsh migration. The balance between marsh destroying and marsh creating processes determines the long-term survivability of a marsh system. Thus, processes of shoreline …
Some Chemical, Physical And Physical And Chemical Properties Of High-Mountain Soils Of The Turkestan Ridge, M Tashkuziev
Some Chemical, Physical And Physical And Chemical Properties Of High-Mountain Soils Of The Turkestan Ridge, M Tashkuziev
Karakalpak Scientific Journal
In the article on the basis of obtained results is revealed the relationship between humus content and composition of carbonates, the mechanical composition, the exchange capacity, and the composition of the absorbed bases.
Some Chemical, Physical And Physical And Chemical Properties Of High-Mountain Soils Of The Turkestan Ridge, M Tashkuziev
Some Chemical, Physical And Physical And Chemical Properties Of High-Mountain Soils Of The Turkestan Ridge, M Tashkuziev
Karakalpak Scientific Journal
In the article on the basis of obtained results is revealed the relationship between humus content and composition of carbonates, the mechanical composition, the exchange capacity, and the composition of the absorbed bases.