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 150 for “"late holocene"”.
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Late Holocene Paleoenvironmental Reconstruction in Barbados
… Atlantic Ocean and Caribbean Sea. Being an isolated island with a karstified aquifer providing the majority of the nation’s water resources, Barbados has found itself in water scarce situations in recent years. In order to better understand natural shifts in groundwater recharge (which is …
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Late Holocene Climate-Flood Relationships on the Lower Ohio River
… high-resolution radiocarbon dating (n = 25), late Holocene sedimentation rates were calculated for Goose Pond. Changes in sediment accumulation rates are attributed to variations in the frequency of flooding events on the lower Ohio River. Elevated sedimentation rates immediately following the …
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Storm signatures in coastal ponds and marshes over the late Holocene
Tropical cyclones pose a growing threat to coastal populations, especially as both populations and infrastructure are increasingly concentrated along the eastern coast of the United States. This thesis seeks to characterize the impacts of storms on coastal ponds and marshes along the eastern coast …
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The late holocene evolution of coastal wetlands in Argyll, Western Scotland
… and relative sea-level changes throughout the Holocene in response to glacio-isostatic adjustment. The complex interplay between land movements and relative sea-level continues to influence the morphological development of the Scottish coast. The study of lowland inter-tidal sedimentary …
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Storm signatures in coastal ponds and marshes over the late Holocene
Tropical cyclones pose a growing threat to coastal populations, especially as both populations and infrastructure are increasingly concentrated along the eastern coast of the United States. This thesis seeks to characterize the impacts of storms on coastal ponds and marshes along the eastern coast …
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Late Holocene hurricane activity and climate variability in the northeastern Gulf of Mexico
… and large-scale climate variability during the Late Holocene is explored. A 4500-year record of hurricane-induced storm surges is developed from sediment cores collected from a coastal sinkhole near Apalachee Bay, Florida. Reconstructed hurricane frequency is shown to exhibit statistically …
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Paleoenvironmental analysis of a late Holocene deposit : Stanton site, west-central North Dakota
… eastern Mercer County, North Dakota, contains a late Holocene organic deposit in the cutbank of an ephemeral stream on the Missouri Plateau. Strati graphic units of the 104-cm section are, in ascending order: (l) gravel; (2) silty, organic, sandy clay; (3) organic silt; (4) silty, sandy, organic …
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Reconstruction of late Holocene vegetation and climate of Hluhluwe Mfolozi area using phytoliths
This study presents a phytolith record from a late Holocene sedimentary core from the Hluhluwe-iMfolozi area in northeastern KwaZulu-Natal. Radiocarbon dating showed the oldest sediments to be from 23 80 ± 40 BP. Phytoliths are present throughout the record. There was a high degree of …
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Late Holocene hurricane activity and climate variability in the Northeastern Gulf of Mexico
… and large-scale climate variability during the Late Holocene is explored. A 4500-year record of hurricane-induced storm surges is developed from sediment cores collected from a coastal sinkhole near Apalachee Bay, Florida. Reconstructed hurricane frequency is shown to exhibit statistically …
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A late Holocene paleoenvironmental reconstruction of a coastal lake in northeastern Dominican Republic
… excellent records of environmental change related to both marine and terrestrial processes. Although coastal paleoenvironments in the Caribbean have been a subject of increasing interest, long-term environmental reconstructions from lakes on the Atlantic side of the Caribbean islands are …
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Paleoecological Analyses of the Late Holocene Dry Period in the Northwestern Great Basin, Nevada
… endorheic lakes that receded greatly during the Holocene. Several proxy records provide extensive evidence that the basin has gone through periods of amelioration from low precipitation followed by a return to dry conditions through the Holocene. Relative to the Pleistocene/Holocene transition …
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Palaeoenvironments and Palaeoclimates During The Late Holocene in Lake Siscunsi (Colombia), A Multiproxy Perspective
… It consists of a review of the mid and late Holocene climates in Colombia, then it summarizes the most important findings in the palaeorecords of the three Colombian cordilleras and it briefly mentions the most significative periods of human effects. It focuses on describing the main …
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Middle to late Holocene sea-level change in Western Denmark : a diatom-based study
Modem diatom assemblages and associated environmental variables were collected from six transects across the salt-marsh surface in the Ho Bugt embayment in western Denmark. The relationship between diatom assemblages and environmental variables (elevation, pH, salinity, loss on ignition, grain …
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Late Holocene Paleoflood Hydrology of the Snake River in the Lower Hells Canyon, Idaho
<p>The Snake River watershed spans a large geographic region from the Rocky Mountains to the inland Pacific Northwest, and a comprehensive paleoflood chronology on the mainstem of the river is key to identifying the frequency and magnitude of large prehistoric floods within the region. We examined …
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The late holocene vegetation history of Lake Farm, South Eastern Cape Province, South Africa
… and this is compared to results from related studies. The significance of the Lake Farm study site has been noted in terms of its location as a 'zone of convergence' for a variety of vegetation types. Results of fossil pollen analysis indicate that environmental conditions prior to 1 …
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Stratigraphic and microfossil evidence of repeated late Holocene tsunami inundation at Sitkalidak Island, Alaska
… Sitkalidak Island reveal three anomalous, laterally continuous sand beds with sharp upper and lower contacts preserved within a coastal peat sequence. The microfossil and lithostratigraphic characteristics of the sand beds, including the presence of anomalous marine planktonic diatoms, high …
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Chironomid-based paleotemperature reconstruction of the North Slave Region, Northwest Territories during the Late Holocene
I reconstructed late Holocene mean July air temperatures using a chironomid-based inference model based on lake sediment collected from two shallow lakes within the North Slave Region, Northwest Territories. No significant shifts were identified in the chironomid species assemblages, which …
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