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 30 for “"tectonic uplift"”.
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Late Quaternary relative sea level change in the South Shetland Islands, Antarctica
… to improve the understanding of the long-term tectonic influence on RSL change. Sediment cores were taken from five lakes on Fildes Peninsula, King George Island (eastern SSIs) at a range of altitudes above present sea level. Diatom, stable isotope (δ13C) and physical analyses of sediments …
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Estimating effective discharge at Lehman Creek, Great Basin National Park, Nevada
… may indicate active downcutting as a response to tectonic uplift in the Basin and Range province. WL-1 also sits on resistant glacial debris (quartzite), which may cause Lehman Creek difficulty in shaping and maintaining its stream channel.
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A Study Of The Beach Terraces On Muroto Peninsula, Island Of Shikoku, Southwestern Japan
… viscosity. This results in a modeled coseismic uplift of 120 cm; in agreement with observations on Muroto Point. Also consistent with the observations is the modeled coseismic landward shift of the hinge line position, and the modeled post-seismic seaward shift of the hinge line position after …
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Paleoenvironmental interpretation of the Guilmette Formation near Ely, Nevada
… in the Cherry Creek section may be a result of tectonic uplift initiated by onset of the Antler Orogeny. Transgression occurred during the Upper Givetian and Frasnian in an easterly direction across Nevada and Utah.</p>
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Cosmogenic dating of fluvial terraces in the Sorbas Basin, SE Spain
… in the Sorbas basin has been linked to both tectonics and climate cycles. Terrace aggradation took place in glacial and interglacial periods. The abandonment of terrace surfaces occurred both at warming transitions and in interglacial periods. New uplift rates calculated for the Pleistocene …
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Geochemistry and Basin Analysis of Laramide Rocky Mountain Basins
… early Eocene sedimentary strata to constrain the tectonic setting, paleogeography and paleoclimate of the Wind River basin. Annual and seasonal variation in ancient riverwater δ¹⁸O reconstructed from shell fossils shows that the Canadian Rocky Mountains was 4.5±1.0 km high in late Cretaceous-early …
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Landscape forcing mechanisms on Quaternary timescales: The Tabernas Basin, SE Spain
… to ascertain the significance of external (e.g. tectonics, climate) and/or internal (e.g. lithological thresholds) forcing mechanisms upon patterns of Quaternary landscape development within the Tabernas Basin, SE Spain.The results of extensive field investigation have developed a four-tiered …
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Investigating rates and mechanisms of lateral erosion in a small bedrock river using erosion pins, structure-from-motion photogrammetry, and optically stimulated luminescence dating: Konza Prairie, northeast Kansas
… of past climate shifts, base level changes, and tectonic uplift in the landscape. While much is known about the mechanics of vertical bedrock incision, the fluvial processes driving lateral bedrock erosion and the timescales over which it occurs remain poorly understood. In order to advance our …
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Deciphering climatic controls on sedimentation in a tectonically active area, Cyprus
… to Quaternary of Cyprus is considered to be a tectonically active period coeval with major climatic change. Uplift, associated with the activities of the supra-subduction zone to south of island was concomitant with global cooling, the expansion of the Northern Hemisphere Ice Sheets and the …
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High Resolution Stratigraphy of Ordovician Carbonates, Kentucky: Evidence for a Greenhouse to Glacial Transition
… formed by global eustatic sea level fall and tectonic uplift of the subducting margin at the onset of Taconic orogenesis. Middle Ordovician carbonates were deposited on a ramp peripheral to a foredeep in Tennessee. The Middle Ordovician High Bridge Group consists of a 2nd-order supersequence …
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Evolution of transient topography on passive margins: A study of landscape disequilibrium in the southern Appalachian Mountains
… 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 in producing local base level drop and subsequent basin-scale transient incision in the southern …
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The use of 10Be surface exposure dating of erratic boulders in the reconstruction of the late Pleistocene glaciation history of mountainous regions, with examples from Nepal and Central Asia
… of the scaling factor, the erosion rate, and the tectonic uplift rate. As long as surface erosion and tectonic uplift rates cannot be constrained to within 10%, however, exposure ages older than 30-40 ka have uncertainties of 20% or more and can be no more than rough approximations. For exposure …
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Paleoenvironmental and tectonic reconstruction of the lower Eocene Ghazij Formation and related units, Balochistan, Pakistan: Implication for India -Asia collision
… of the Indian plate preserve the oldest syntectonic deposits of initial India-Asia collision. Analysis of lithofacies, paleoflow directions, and sandstone petrography indicate that the process of deformation and uplift of the carbonate shelf along the western margin of the Indian continent …
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Siesmic Stratigraphy of Upper Pleistocene gravel and holocene mudbelt deposits between wreck point and the kamma river on the western shelf of South Africa
… erosional unconformity formed as a result of tectonic uplift and a relative drop in sea level. A wave-cut knick point provides accommodation space for the deposition of Pleistocene and Holocene sediment above the erosional unconformity. The Lowstand Systems Tract (LST) consists of a condensed …
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Sedimentology and diagenesis of Lower to Middle Cambrian carbonate platform, Shady Dolomite, Virginia
… fluid flow that developed in response to tectonic uplift.
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Sequence Stratigraphy of Middle-Mississippian Carbonates of the Southern Appalachians: Tuscumbia Limestone, Tuscumbia, AL
… controls on deposition (e.g., sea level, tectonics, paleogeography, and paleoceanographic conditions). Additionally, possible sources of the silica (chert) found within these units (e.g., eolian dust, upwelling) are evaluated based upon thin section analysis. Four facies and one subfacies …
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Multi-timescale mechanics of an active low-angle normal fault
… to better understand the structural and tectonic evolution of detachment faults as well as to determine whether these faults slip in large earthquakes or predominantly creep aseismically. Bounding the actively exhuming Dayman-Suckling metamorphic core complex, the Mai’iu fault in Papua …
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Facies analysis of three members of the Scarborough Formation (Middle Jurassic : Lower Bajocian) in the Cleveland Basin, northeast England : Blea Wyke, Byland Limestone and Crinoid grit members
… in the rate of marine transgression followed by tectonic uplift and subsequent geomorphic decay of the major landmass to the north [Mid North Sea High]. Transgression generated an east-west orientated epeiric seaway connecting the Sole Pit Trough with an areally restricted Pennine Massif. Within …
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Seepage of hydrocarbon bearing fluids at the Carlos Ribeiro and Darwin mud volcanoes (Gulf of Cadiz)
… alternating with phases of mud extrusion and tectonic uplift. The results of this study demonstrate that fluid (and chemical) fluxes from MVs vary over relatively small time and space scales and that mud volcanism may contribute significantly to the oceanic inventories of Li+ and B. Moreover, …
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Alluvial river response to active tectonics in the Dehradun region, Northwest India: A case study of the Ganga and Yamuna rivers.
In environments characterised by active tectonics, it is widely accepted that river morphology will be affected by active fault displacement. For example, there is documented evidence of change in channel slope, channel width, channel braiding patterns, grain size distribution trends, and stream …
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