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Showing 1 to 7 of 7 for “"Palaeotemperature"”.
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Biodiversity crisis and recovery during the Triassic-Jurassic greenhouse interval: testing ocean acidification hypotheses
… global ocean acidification and increased oceanic palaeotemperatures. Consequently, the aim of this present work was to test this ocean acidification hypothesis by investigating morphological changes in selected shelled fossil species across this extinction event, and attempt to correlate them with …
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Heat transfer processes in the upper crust: influence of structure, fluid flow, and palaeoclimate
… available in palaeoclimatology to construct palaeotemperatures without using indirect proxy methods. Furthermore, a general better understanding of the processes affecting the thermal regime of the upper crust is needed for better downward continuation of thermal data, which is important for …
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Palynological investigations of Cenomanian chalks and marls from England
… cysts species appear to be controlled by palaeotemperature. Palaeohystrichophora infusorioides is therefore recognised as a slightly cooler water cyst (23°C), while Cleistosphaeridium huguoniotii and Cyclonephelium distinctum both are interpreted as being slightly warmer water cysts …
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Palaeoclimatology, stratigraphy and biotic responses in the middle Eocene
… reconstructions based on the Mg/Ca palaeotemperature proxy.<br/><br/>In Chapter 4, new foraminiferal stable isotope records (~5 kyr resolution) from Demerara Rise in the equatorial Atlantic are generated to test the hypothesis that the onset of continental ice sheets in the Northern …
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Reconstruction of environmental and climate dynamics using multi-proxy evidence from palaeosols of the Western Cape, South Africa
… calculate weathering intensities, pedogenesis, palaeotemperature and palaeoprecipitation for the various locations using geochemical and stable isotope data. Results of this study indicate that palaeosol-based proxies have the potential to provide snapshots into the palaeoenvironments and …
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The Use of Biomarker and Stable Isotope Analyses in Palaeopedology / Reconstruction of Middle and Late Quaternary Environmental and Climate History, with examples from Mt. Kilimanjaro, NE Siberia and NE Argentina
… D/L-aspartic acid and D/L-lysine may serve as palaeotemperature proxies. In the Arg. D4 record, d13C varied in a wide range (from -30.1‰ to -17.4‰), indicating C3-C4 vegetation changes and hence allowing a reconstruction of the palaeovegetation. However, the natural abundance of 13C was no …
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Aspects of Neogene palaeoceanography in the southern Tasman Sea (DSDP site 593)
… water δ¹⁸Ow values during the Neogene for use in palaeotemperature calculations, due to the unknown ice budget. A staggered value over time is established and applied to the Hole 593 δ¹⁸O data. Previous attempts at determining sea water palaeotemperatures often use microfossil assemblages …