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 541 for “"Holocene"”.
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Late Holocene Paleoenvironmental Reconstruction in Barbados
… a paleoclimate reconstruction for the late Holocene on Barbados using stable and radiogenic isotope ratios in speleothem lamina as proxies. In addition, it introduces the use of novel mineralogical analyses using Raman spectroscopy and large chamber-scanning electron microscopy to supplement …
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Holocene landscape history of southern Portugal
… This thesis contributes to the understanding of Holocene palaeoenvironmental change in the Algarve region with new palynological data from intertidal, estuarine sediments. In a region without natural lakes, estuarine sediments deposited during the post-glacial marine transgression represent a …
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Studies in the holocene vegetation history of Wensleydale
… been used as the basis for a discussion of the Holocene vegetation history of Wensleydale. The palynological, radiocarbon, humification, chemical and archaeological/historical evidence is drawn together to provide a comprehensive study of the vegetation changes which have occurred over the …
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HOLOCENE PALAEOCLIMATE RECONSTRUCTION FROM N EW ZEALAND PEATLANDS
… forced by the precessional cycle. The 'Mid-Holocene Transition' to wet conditions appears to contradict previous work from New Zealand that infers a drier late Holocene. This apparent contradiction can, however, be reconciled by increasing seasonality that would also explain the rise in …
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Holocene Geomorphology of the Macdonald and Tuross Rivers
… then fallen, relative to the land during the Holocene due to isostatic compensation to loading of the ocean basins. Geomorphological and stratigraphic data from the Macdonald and Tuross valleys, whichdrain to this coast, are combined with radiocarbon and optically stimulated luminescence …
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Holocene Geomorphology of the Macdonald and Tuross Rivers
… then fallen, relative to the land during the Holocene due to isostatic compensation to loading of the ocean basins. Geomorphological and stratigraphic data from the Macdonald and Tuross valleys, whichdrain to this coast, are combined with radiocarbon and optically stimulated luminescence …
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Geochemistry of Holocene coastal deposits (NW Germany): palaeoenvironmental reconstruction
Grundlage der vorliegenden Dissertation, die Teil eines interdisziplinären Projektes des ICBM und des Forschungszentrums Terramare ist, bilden neun Bohrkerne aus dem nordwestdeutschen Küstenraum. Die erbohrten Kerne erfassen die gesamten holozänen Ablagerungen und wurden in hoher Auflösung u.a. …
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Holocene Formation and Evolution of Horn Island, Mississippi, USA
<p>Horn Island, one of the most stable barriers along the Mississippi-Alabama chain, provides critical habitat, helps regulate estuarine conditions in the Mississippi Sound, and reduces wave energy and storm surge for the mainland. This study integrates 2,200 km of high-resolution geophysics, 35 …
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Holocene sedimentary history of Chilliwack Valley, Northern Cascade Mountains
… trajectory of the river valley though the Holocene Epoch, and development of a sediment transfer model that describes the relaxation from the Fraser glaciation. The total Holocene sediment yield is estimated from basins across several scales using field and remotely sensed evidence to …
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Human-environmental relations on Bodmin Moor during the Holocene
This thesis describes palaeoenvironmental investigations on Bodmin Moor aimed at determining the timing, nature and extent of human induced environmental change on the moor. Pollen, charcoal and loss-on-ignition investigations were carried out at two main areas with chronological control provided …
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Biogenic Tracers Through the Holocene on the Alaskan Shelf
… of biogenic matter into the system over the Holocene, and (3) assemble the history of depositional events that have occurred in the Alaskan shelf over the Holocene.</p> <p>The C/N and δ<sup>13</sup>C in the very earliest record at Station 5, 12,000 ybp, suggest marine conditions prior to the …
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Assessing Holocene and late Pleistocene geomagnetic dipole field variability
… of sedimentary palaeomagnetic data and Holocene dipole field reconstructions. New palaeomagnetic records are presented from a maar crater lake in New Zealand and a post-glacial lake in Sweden. The fidelity of the data is evaluated through comparisons with sediment parameters sensitive to …
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Holocene environments and vegetational change on four Polynesian islands
… environmental and vegetational change during the Holocene, which include long-term climatic variations affecting broad scale vegetation changes on Upolu and Atiu; long term sea-level change influencing the local environment and vegetation on Atiu; localised disruption of vegetation in the Vaihiria …
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Holocene Arroyo Cut and Fills Cycles, South-Central Washington
<p>Ephemeral streams have cut deeply incised arroyos into alluvial and eolian sediments in many of the watersheds within the Yakima Training Center (YTC) military reservation, south-central Washington. The most recent channel incision episode along Selah Creek is primarily attributed to multiple …
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Holocene Periods of Aggradation and Incision, Hanson Creek, Washington
<p>The causes and timing of cycles of aggradation and incision in the Hanson Creek drainage in central Washington provide insight into changes in channel morphology and paleoenvironment within the region over the last 8000 years. Stratigraphically and spatially coincident archaeological evidence …
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