Дисертації з теми "Glacial sedimentation"
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van, der Vegt Paul. "Glacial systems sedimentation and tunnel valleys." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610766.
Повний текст джерелаLeNoir, James. "Post-Glacial Sedimentation in Ossipee Lake, New Hampshire:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108650.
Повний текст джерелаLand cover and climate changes, attributed to natural and anthropogenic forcings, cause deviations in geomorphic processes that act to deliver sediment from watersheds to lakes. In New England, contradictory evidence exists as to the influence of deforestation associated with EuroAmerican settlement and major flood events on watershed erosion rates over the past ~250 years. Through combining sediment core analysis from Ossipee Lake, New Hampshire with geomorphic analysis of the Ossipee Lake watershed, this study quantifies Holocene through Anthropocene watershed erosion rates, and assesses variations in rates in relation to short-term historic events such as major storm events or deforestation, and long-term variations related to natural climate variability and post-glacial landscape evolution. An 8.63 m core was collected and spans the entire period from deglaciation to present. Bulk composition and age-depth modeling, utilizing both short-lived radioisotopes and radiocarbon dating, are used to quantify changes in deposition and inferred erosion rates over time. Additional insight on sedimentary processes is provided by measurements of magnetic susceptibility and bulk geochemistry. Lake-sediment data suggests clastic sediment mass accumulation rates vary between 0.0032 to 0.5870 g/cm2/yr, with deposits of increased terrestrially derived sediment focused between ~8500 to 7800, ~6500 to 2500, and 1600 cal yr BP to present. Geomorphic analysis is used to identify regions within the watershed that act to deliver sediment to Ossipee Lake. Potential sources of sediment supply include loose, unconsolidated proglacial deposits near Ossipee Lake that transition to primarily till in upland areas. Calculated bed shear stress along rivers highlights areas in the watershed capable of transporting sediment and areas that can serve as traps thus limiting sediment delivery to Ossipee Lake
Thesis (MS) — Boston College, 2019
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Earth and Environmental Sciences
Roop, Heidi Anne. "Sedimentation in a proglacial lake : interpreting intra- and inter-annual sedimentation in Linnévatnet, Spitsbergen, Norway /." Connect to online version, 2007. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2007/235.pdf.
Повний текст джерелаIncludes one CD-Rom appendix of 2005-2006 grain size data. Includes bibliographical references (leaves 125-129).
Miller, Helen. "Lake bed environments, modern sedimentation and the glacial and post-glacial history of Windermere, UK." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/365472/.
Повний текст джерелаBenn, Douglas Iain. "Scottish late-glacial moraines : debris supply, genesis and significance." Thesis, University of St Andrews, 1991. http://hdl.handle.net/10023/2676.
Повний текст джерелаLiu, Jing-pu. "Post-glacial sedimentation in a river -dominated epicontinental shelf: The Yellow Sea example." W&M ScholarWorks, 2001. https://scholarworks.wm.edu/etd/1539616747.
Повний текст джерелаWang, Dong 1963. "Continental-slope sedimentation adjacent to an ice-margin, Labrador sea : depositional facies and glacial cycles." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56949.
Повний текст джерелаSix major glacial advances were identified in Mid- to Late-Wisconsinan (64-10 ka) slope sediments by 6 very dark hemipelagic units containing abundant sinistral-coiling, cold-water foraminifera. The associated ice-retreat phases are characterized by the occurrence of turbidites, debris-flow deposits, nepheloid-flow deposits, and ice-rafted debris (IRD).
Strouse, Stephanie. "The Effect of Millponds on Sedimentation in a Post-Glacial Mid-Coast Maine River Valley." Thesis, Boston College, 2013. http://hdl.handle.net/2345/2970.
Повний текст джерелаDam-influenced streambank morphology has not been studied extensively in rivers in deglaciated landscapes with high densities of colonial-era milldams. Fluvial restoration in the eastern U.S. often focuses on understanding pre-Colonial floodplain processes. Recent work by Walter and Merritts (2008a) in the Piedmont of the U.S. mid-Atlantic region suggests milldams significantly impact sedimentation by creating surfaces composed of post-dam legacy sediment that are often abandoned by the river and function as fill terraces. I analyze channel morphology and sedimentation patterns upstream of two breached dams on the Sheepscot River in mid-coastal Maine using lidar digital elevation models, historical aerial photographs, radiocarbon dating, and hydraulic modeling. In the past several decades, observable channel morphologic changes occurred at the two study sites: Maxcy's Mills dam (built in 1809, it was 2-m high and breached in the late 1950s), and at Head Tide dam (built in the 1760s, it is 4-m high and was partially breached in 1952). The Sheepscot River has a native population of Atlantic salmon, which is a federally listed endangered species. Understanding the existence and transport of legacy sediment has become an important component of habitat restoration efforts in the region. The goal of this investigation is to determine the extent and morphologic function of legacy sediment in order to better understand how historical dam sites affect channel morphology and sediment transport in a post-glacial, low-gradient river system. Field and remote sensing analyses indicate that surfaces (up to 2.65 m high) composed of mud and sand function as floodplains 1 km upstream from Head Tide dam and surfaces 90 cm high continue 2.5 km upstream from Maxcy's Mills. Analysis of seven radiocarbon dates from pieces of tree bark sampled from the stratigraphy (58-187 cm below the surface) of the two study sites suggest up to 1.8 m of sediment upstream of the two study sites was deposited within the past 300 years and is therefore a legacy of the dams. Quantification of the total volume of stored legacy sediment is on the same scale as volumes observed in the mid-Atlantic Piedmont region, leading to the conclusion that post-glacial rivers in northern New England store milldam sediment in similar fashion to streams analyzed in the Walter and Merritts (2008a) study
Thesis (MS) — Boston College, 2013
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Earth and Environmental Sciences
Radford, Josh. "Shelf-to-canyon sedimentation on the South Westland Continental Margin, Westland, New Zealand." Thesis, University of Canterbury. Geological Sciences, 2012. http://hdl.handle.net/10092/6991.
Повний текст джерелаPfirman, S. L. "Modern sedimentation in the Northern Barents Sea : input, dipersal and deposition of suspended sediments from glacial meltwater." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/54946.
Повний текст джерелаMicrofiche copy available in Archives and Science.
Includes bibliographies.
by Stephanie Louise Pfirman.
Ph.D.
Harrison, Jeffrey Michael. "A CORRELATION OF WESTERN ARCTIC OCEAN SEDIMENTATION DURING THE LATE HOLOCENE WITH AN ATMOSPHERIC TEMPERATURE PROXY RECORD FROM A GLACIAL LAKE IN THE BROOKS RANGE, ALASKA." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1366295554.
Повний текст джерелаCubitt, Chris. "Controls on reservoir development and quality in a glacial sequence; a study of the late palaeozoic, Cooper Basin South Australia and Queensland, Australia : thesis submitted to the University of Adelaide in fullfillment [sic] of the requirement for the Degree of Doctor of Philosophy, July 2000." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phc962.pdf.
Повний текст джерелаHodder, Kyle Ross. "Holocene and recent sedimentation record from glacier-fed Mud Lake, British Columbia, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63053.pdf.
Повний текст джерелаLorrey, Andrew M. "Distribution of Patterned Ground and Surficial Deposits on a Debris-covered Glacier Surface in Mullins Valley and Upper Beacon Valley, Antarctica." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/LorreyAM2002.pdf.
Повний текст джерелаWells, Colleen M. "Investigating coarse-grained glacio-fluvial outwash with ground penetrating radar (GPR), Harpursville, Susquehanna Valley, NY." Diss., Online access via UMI:, 2007.
Знайти повний текст джерелаPasquier, Virgil. "Climate and sea level variations in the Gulf of Lion : coupling stable and radiogenic isotopes proxies." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0094/document.
Повний текст джерелаBy its position, the Gulf of Lion is an ideal location for investigation of past ecological changes and processes affecting the sedimentary deposition. Previous work has highlighted the impacts of climatic and glacio-eustatic changes on the GoL stratigraphic organization, but also on terrestrial exports of organic matter.This isotopic study based on the organic carbon and nitrogen preserved in PRGL1-4 sediments highlights important rivers runoff during warm periods of the last 200 000 years.Regional intercomparison with terrestrial and marine records indicates that these river exports resulting from an increase of precipitation over the North Mediterranean borderland.Using PRGL1-4 location, out of Mediterranean cyclogenetic area, we suggest that these pluvial events occurred in response to enhance passage of North Atlantic atmospheric perturbation into the Western Mediterranean basin.Pyrite sulfur isotopes investigations over the last 500 kyr have also been done. The stratigraphic variations (up to 76‰) in the isotopic data reported here are among the largest ever observed in pyrite, and are in phase with glacial-interglacial sea level. These results suggest that there exist important but previously overlooked depositional controls on sedimentary sulfur isotope records. Two different mechanisms influencing the isotopic fractionation can explain the observed dataset: a climatic modulation of the bacterial activity, and / or (ii) a local sedimentary modulation involve during early diagenetic formation of pyrite in relation with the eustatic variations
Lemoine, Richard M. J. "Late glacial history, paleoecology and sedimentation in the Lake Nipigon basin, Ontario." 1989. http://hdl.handle.net/1993/16866.
Повний текст джерелаReid, David Eugene. "Late Cenozoic glacial-marine, carbonate, and turbidite sedimentation in the northwestern Ross Sea, Antarctica." Thesis, 1989. http://hdl.handle.net/1911/13386.
Повний текст джерелаEvans, M. D. "A geomorphological and sedimentological investigation into the glacial deposits of the Lake Clearwater basin, Mid Canterbury, New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Geology in the University of Canterbury /." 2008. http://hdl.handle.net/10092/1531.
Повний текст джерелаGriffith, Thomas Ward. "A geological and geophysical investigation of sedimentation and recent glacial history in the Gerlache Strait region, Graham Land, Antarctica." Thesis, 1988. http://hdl.handle.net/1911/13285.
Повний текст джерелаSINGER, JILL KAREN. "TERRIGENOUS, BIOGENIC, AND VOLCANOCLASTIC SEDIMENTATION PATTERNS OF THE BRANSFIELD STRAIT AND BAYS OF THE NORTHERN ANTARCTIC PENINSULA: IMPLICATIONS FOR QUATERNARY GLACIAL HISTORY." Thesis, 1987. http://hdl.handle.net/1911/16106.
Повний текст джерелаJenson, John W. "A nonlinear numerical model of the Lake Michigan Lobe, Laurentide Ice Sheet." Thesis, 1993. http://hdl.handle.net/1957/35632.
Повний текст джерелаCubitt, Chris, and National Centre for Petroleum Geology & Geophysics (Australia). "Controls on reservoir development and quality in a glacial sequence; a study of the late palaeozoic, Cooper Basin South Australia and Queensland, Australia : thesis submitted to the University of Adelaide in fullfillment [sic] of the requirement for the Degree of Doctor of Philosophy, July 2000 / Chris Cubitt." 2000. http://hdl.handle.net/2440/21707.
Повний текст джерелаCD-ROM contains Appendices (1-10) in PDF.
Includes copies of papers co-authored by the author.
Includes bibliographical references (leaves [471]-499 in vol. 2)
System requirements for accompanying CD-ROM: Macintosh or IBM compatible computer with Windows NT. Other requirements: Adobe Acrobat Reader.
2 v. (various pagings) : ill. (some col.), maps, ports. ; 30 cm. + 1 CD-ROM (4 3/4 in.)
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Studies the provenance and diagenesis of the Merrimelia Formation in South Australia and Queensland; a complex mosaic of glacial facies in which the Tirrawarra Sandstone and Merrimelia Formation exhibit an interfingering relationship, and defines the relationship further. Indicates that the Tirrawarra Sandstone should be included in the Merrimelia Formation as a "facies type" as both the Merrimelia and Tirrawarra sediments form an integrated suite of sediments.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geology, 2000?
Cubitt, Chris, and National Centre for Petroleum Geology & Geophysics (Australia). "Controls on reservoir development and quality in a glacial sequence; a study of the late palaeozoic, Cooper Basin South Australia and Queensland, Australia : thesis submitted to the University of Adelaide in fullfillment [sic] of the requirement for the Degree of Doctor of Philosophy, July 2000 / Chris Cubitt." Thesis, 2000. http://hdl.handle.net/2440/21707.
Повний текст джерелаCD-ROM contains Appendices (1-10) in PDF.
Includes copies of papers co-authored by the author.
Includes bibliographical references (leaves [471]-499 in vol. 2)
System requirements for accompanying CD-ROM: Macintosh or IBM compatible computer with Windows NT. Other requirements: Adobe Acrobat Reader.
2 v. (various pagings) : ill. (some col.), maps, ports. ; 30 cm. + 1 CD-ROM (4 3/4 in.)
Studies the provenance and diagenesis of the Merrimelia Formation in South Australia and Queensland; a complex mosaic of glacial facies in which the Tirrawarra Sandstone and Merrimelia Formation exhibit an interfingering relationship, and defines the relationship further. Indicates that the Tirrawarra Sandstone should be included in the Merrimelia Formation as a "facies type" as both the Merrimelia and Tirrawarra sediments form an integrated suite of sediments.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geology, 2000?
Achenbach, Hermann. "Historische und rezente Gletscherstandsschwankungen in den Einzugsgebieten des Cha Lungpa (Mukut-, Hongde- und Tongu-Himalaja sowie Tach Garbo Lungpa), des Khangsar Khola (Annapurna N-Abdachung) und des Kone Khola (Muktinath-, Purkhung- und Chulu-Himalaja)." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B2F4-3.
Повний текст джерелаStackhouse, Stanley B. "Late Pleistocene New Jersey Shelf sedimentation as a response to glacio-eustatic sea level rise." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-08-289.
Повний текст джерелаtext
Scheuer, Carsten [Verfasser]. "Glacially related and bottom current controlled sedimentation processes on the West Antarctic continental margin : interpretations derived from seismic reflection investigations / Carsten Scheuer." 2006. http://d-nb.info/980889340/34.
Повний текст джерелаWelke, Bethany. "Double dating detrital zircons in till from the Ross Embayment, Antarctica." Thesis, 2014. http://hdl.handle.net/1805/4450.
Повний текст джерелаU/Pb and (U-Th)/He (ZHe) dating of detrital zircons from glacial till samples in the Ross Embayment, Antarctica records cooling after the Ross/Pan-African orogeny (450-625 Ma) followed by a mid-Jurassic to mid-Cretaceous heating event in the Beacon basin. Zircons were extracted from till samples from heads of major outlet glaciers in East Antarctica, one sample at the mouth of Scott Glacier, and from beneath three West Antarctic ice streams. The Ross/Pan-African U/Pb population is ubiquitous in these Antarctic tills and many Beacon Supergroup sandstones, thus 83 grains were analyzed for ZHe to subdivide this population. Two ZHe age populations are evident in East Antarctic tills, with 64% of grains 115-200 Ma and 35% between 200-650 Ma. The older population is interpreted to be associated with the Ross/Pan-African orogeny including cooling of the Granite Harbour Intrusives and/or exhumation of the older basement rocks to form the Kukri Peneplain. The lag time between zircon U/Pb, ZHe and 40Ar/39Ar ages from K-bearing minerals show cooling over 200 My. Grains in East Antarctic tills with a ZHe age of 115-200 Ma likely reflects regional heating following the breakup of Gondwana from the Ferrar dolerite intrusions, subsidence within the rift basin, and a higher geothermal gradient. Subsequent cooling and/or exhumation of the Transantarctic Mountains brought grains below the closure temperature over a span of 80 My. This population may also provide a Beacon Supergroup signature as most of the tills with this age are adjacent to nunataks mapped as Beacon Supergroup and contain an abundance of vi Beacon pebbles within the moraine. Nine zircons grains from three Beacon Supergroup sandstones collected from moraines across the Transantarctic Mountains yield ages from 125-180 Ma. West Antarctic tills contain a range of ZHe ages from 75-450 Ma reflecting the diverse provenance of basin fill from East Antarctica and Marie Byrd Land. ZHe and U/Pb ages <105 Ma appear to be distinctive of West Antarctic tills. The combination of U/Pb, ZHe and 40Ar/39Ar analyses demonstrates that these techniques can be used to better constrain the tectonic evolution and cooling of the inaccessible subglacial source terrains beneath the Antarctic Ice Sheet.
Legg, Nicholas T. "Debris flows in glaciated catchments : a case study on Mount Rainier, Washington." Thesis, 2013. http://hdl.handle.net/1957/38180.
Повний текст джерелаGraduation date: 2013