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 9 of 9 for “"plant macrofossils"”.
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The fossil flora of the drywood formation of southwestern Missouri
… the major goals of this study were to collect plant macrofossils over a larger area to obtain a larger sample and to carefully define the strata from which these fossils were taken. Secondarily, the flora was also to be more carefully identified in light of the numerous studies made on the …
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Paleoecology of a late quaternary biota at the McClusky Canal Site, central North Dakota
… bivalves, 9 species of gastropods, 17 genera of plants, and 13 taxa that were identified only to the family level or above. Both mollusc and plant macrofossils are most abundant and diverse in units 2 and 3. The fossil assemblage of these units resembles modern com munities in northern Minnesota …
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An evaluatory study of the methods used in the reconstruction of historical vegetation and land-use, with reference to part of East Sussex, England
… lithostratigraphy, the analyses of pollen, plant macrofossils (supported by radiocarbon dating) and mineralogy, and primary and secondary documentary sources. The local archaeological record is also examined. Consideration is given to the extent to which the species and growth forms present, …
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Genesis and Sedimentation of an Ice-Walled Lake Plain in Northeastern Illinois
… by obtaining radiocarbon ages of tundra plant fossils deposited within the IWLP sediments. The goals of the present study were to: i) determine the rate of expansion of a single IWLP, ii) detail the sedimentology of the IWLP and iii) propose a depositional model for development of the …
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Investigations of temporal changes in climate and the geomagnetic field via high-resolution radiocarbon dating
… was validated by comparison to the 14C ages of plant macrofossils. Similarly, the 14C wiggle-match dating technique was used to test the accuracy of a varve chronology of Lake Kälksjön in west-central Sweden for the same time period. The constructed chronologies of Lake Gyltigesjön and Lake …
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North of the Cape and south of the Fly: the archaeology of settlement and subsistence on the Murray Islands, eastern Torres Strait
… securely dated to almost 3000 years BP. Although plant macrofossils where absent during the excavations, evidence for horticultural subsistence on Dauar was identified through the extraction and identification of plant phytoliths and starch grains from excavated sediment samples. In combination …
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Mid- to Late Holocene flood reconstruction from two varved sediment profiles of pre-alpine Lake Ammersee (Southern Germany)
… spectrometry (AMS) 14C dating of 14 terrestrial plant macrofossils. Since ~5500 varve years before present (vyr BP), in total 1573 detrital layers were detected in either one or both of the investigated sediment profiles. Based on their microfacies, geochemistry, and proximal-distal deposition …
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Biostratigraphy and palaeolimnology of late-glacial and holocene lake marls at Quidenham Mere, Norfolk.
… by detrital thorium. Few terrestrial plant macrofossils could be recovered for radiocarbon dating, so the age model has relied largely on ages inferred from pollen stratigraphy. However, dating the Marginal cores on the basis of the pollen stratigraphy was not straightforward, because …
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Tree-limit ecotonal response to Holocene climate change in the Scandes Mountains of west-central Sweden
… were studied mainly by means of pollen and plant macrofossil analysis of two lake sediment sequences (Lakes Stentjärn and Spåime), located above the present-day tree-limit. The lake sediments were also subjected to high-resolution elemental and mineral magnetic measurements, which …