Global ETD Search
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Showing 1 to 18 of 18 for “"Paleoenvironmental reconstructions"”.
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Biogeochemical Cycling and Paleoenvironmental Reconstructions of the Toarcian Oceanic Anoxic Event from Western North America
… has sought to reconstruct biogeochemical and paleoenvironmental changes across the T-OAE from a sedimentary succession that was deposited on the margins of a different ocean basin away from the well-studied European successions. Specifically, I have studied the chemostratigraphy of the Fernie …
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Local variability in early Oligocene paleosols as a result of ancient soil catenary processes, Brule Formation, Toadstool Park, Nebraska
Paleopedology is often employed in paleoenvironmental reconstructions because the features of paleosols are affected by changes in climate, ecology, topography, and lithology over time. These changes cause small-scale variations in the morphology and apparent development of paleosols and influence …
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North American and Greenland modern pollen data for multi-scale paleoecological and paleoclimatic applications
… for use in quantitative calibration studies and paleoenvironmental reconstructions. The geo-referenced database includes 4569 samples from all regions of the continent. The database includes 934 pollen taxa that range from common taxa to those that may be used for regional-scale reconstructions. …
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The sedimentary record of seafloor uplift
… The results have broad implications for paleoenvironmental reconstructions, basin evolution models, and geohazard assessments in both modern and ancient marine settings.
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From hunters to fisherman? Developing marine resource specialization on the Santa Barbara Channel Analysis of the artifacts and midden constituents from Ca-Sba-71
… artifacts, midden constituent analyses, and paleoenvironmental reconstructions will be utilized in an attempt to answer these questions; Previous research has centered on the idea that marine resource specialization could not have developed from a supposed terrestrial hunting orientation. …
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Paleogene-Early Neogene palynomorphs from the Eastern Equatorial Atlantic and Southeastern Florida, USA: Biostratigraphy and paleoenvironmental implications
… descriptions supplemented palynomorph data for paleoenvironmental reconstructions in ODP Hole 959A and W-17001. In ODP Hole 959D, five biozones were erected, a Late Paleocene hiatus event was identified, four new dinoflagellate cyst species were formally named, and an outer neritic …
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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
… suitable coring locations for paleoclimate reconstructions. The δ13Cwax record shows a stable arid climate over the dry regions of the Indus plain and a terrestrial biome dominated by C4 vegetation for the last 6,000 years. As the climate became more arid ~4,000 years, sedentary agriculture …
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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
… suitable coring locations for paleoclimate reconstructions. The ([delta]¹³Cwax record shows a stable arid climate over the dry regions of the Indus plain and a terrestrial biome dominated by C₄ vegetation for the last 6,000 years. As the climate became more arid ~4,000 years, sedentary …
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A stable isotope and macro-charcoal sediment record spanning the Pleistocene-Holocene transition from Maple Pond in the southern Shenandoah Valley, Virginia, USA
This study presents a paleoenvironmental analysis of a 147-cm sediment core from Maple Pond, a sinkhole pond within the Shenandoah Valley Sinkhole Pond complex at the base of the Blue Ridge in central Virginia. The results document more than 15,000 years of continuous sediment accumulation, fire …
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Paleoenvironmental Reconstruction of a Coastal Lagoon in Southwestern Dominican Republic
… the potential for paleotempestology and other paleoenvironmental reconstructions. Three AMS 14C dates indicate that the lake is ~1100 years in age. Sediment analyses revealed three major events that correlate with bands of uncharacteristic sediment composition and particle size at 74–77.5 cm, …
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RECONSTRUCTING CLIMATE ON THE GREAT PLAINS FROM BURIED SOILS: A QUANTITATIVE APPROACH
… canyons. In an effort to capitalize on the rich paleoenvironmental record that buried soils can provide, this study presents the Buried Soil Reconstruction Model (BuSCR), a method for reconstructing paleoclimate based on properties of buried soils. The model was developed based on a study of …
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Paleoclimate and paleoecology of Miocene Eastern African primate habitats : a multiproxy approach.
… datasets, limiting the accuracy of climate reconstructions. This dissertation addresses that gap by expanding the leaf physiognomic framework for tropical Africa and integrating it with stratigraphy, sedimentology, paleopedology, geochemistry, phytolith analyses, and vertebrate paleontology …
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The Role of Fire in Montane Forest Environments in the Willamette National Forest, Oregon
… and historical data were combined with the paleoenvironmental reconstructions at Blair Lake in order to better understand the role that humans may have played in the creation and/or use of montane forests and whether human activity or climate was the major influence on past fire and …
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The Prevalence of Bacteria-Sediment Associations and Their Effect on Sediment Settling Velocities in Aquatic Environments of Agricultural Saskatchewan and Alpine British Columbia
… process-inference, leading to more holistic paleoenvironmental reconstructions.
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Reconstruction of aspects of Northern New Zealand paleoclimate over the last 200 ka using laminated Auckland maar lake sequences
… chronological control required to optimise paleoenvironmental reconstructions. In this context Onepoto maar paleolake in the Auckland Volcanic Field is important as it contains a high-resolution record of continuous sedimentation in the lake from its formative phreatomagmatic eruption ≤190 …
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Late glacial and Holocene marine geology, palaeoceanography and palaeoecology of the Northern Isles of Scotland
… the Holocene, which has consequence for future paleoenvironmental reconstructions in the region. Chapter 5 consists of a marine palaeoenvironmental reconstruction from a core spanning the Late glacial and Holocene in Scapa Flow, Orkney. This record aims to provide the paleoenvironmental backdrop …