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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 31 for “"Palaeoenvironments"”.
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Characterising the Namaqualand Mudbelt: Chronology, Palynology and Palaeoenvironments
This multiproxy study explores the palaeoenvironmental record of two cores, H2 and H7, from the Namaqualand Mudbelt representing an arid and highly variable landscape. As bulk organic radiocarbon ages previously proved problematic, with anomalous reversals, the primary objective was to improve …
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Late quaternary palaeoenvironments at Vankervelsvlei, near Knysna, South Africa
This dissertation outlines the results of a study undertaken to describe the environmental history of Vankervelsvlei, a schwingmoor-type bog near Knysna on the south coast of South Africa. The study relies heavily on the use of fossil pollen as an indicator of vegetation change from which …
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Late quaternary palaeoenvironments of the Sandveld, Western Cape Province, South Africa
This thesis presents new palaeoenvironmental evidence from the semi-arid lowlands of the West Coast Sandveld, which prompts a fresh synthesis as to the nature of late Quaternary environmental changes in the southwestern Cape's fynbos biome. The study is centred on Verlorenvlei, a remote coastal …
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Micropalaeontology, Palaeoenvironments and Sequence Stratigraphy of the Sulaiy Formation of Eastern Saudi Arabia
… and the accommodation space. The important palaeoenvironments are intertidal, restricted lagoon (subtidal), open marine, deeper open marine, inner shoal, shoal and platform margin. Generating, and testing, a depositional model as a part of formulating a sequence stratigraphical …
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Palaeoenvironments and Palaeoclimates During The Late Holocene in Lake Siscunsi (Colombia), A Multiproxy Perspective
This thesis provides a palaeolimnological and environmental reconstruction of the last ~2,800 years of Lake Siscunsí, located in the Eastern Cordillera of Colombia. This study is mainly based on a high-resolution diatom record in combination with Chlorophyll 𝑎 and other analyses previously done in …
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The Weichselian in southern Sweden and southwestern Baltic Sea : glacial stratigraphy, palaeoenvironments and deglaciation chronology
In this thesis the Weichselian glaciation history of southernmost Sweden and the southwestern Baltic Basin is discussed, with special emphasis on Middle and Late Weichselian ice advances and subsequent deglaciations. The main study area was Kriegers Flak in the southwestern Baltic Sea where …
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A pollen analytical investigation of Holocene palaeoenvironments at Lake Tyrrell, semi-arid Northwestern Victoria, Australia
This thesis presents a pollen analytical reconstruction of mallee vegetation history in the vicinity of Lake Tyrrell, a large active salt lake in semi-arid northwestern Victoria. The project combined studies of the modern pollen rain, pollen depositional processes and sedimentological …
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A pollen analytical investigation of Holocene palaeoenvironments at Lake Tyrrell, semi-arid Northwestern Victoria, Australia
This thesis presents a pollen analytical reconstruction of mallee vegetation history in the vicinity of Lake Tyrrell, a large active salt lake in semi-arid northwestern Victoria. The project combined studies of the modern pollen rain, pollen depositional processes and sedimentological …
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Late Quaternary palaeoenvironments of the southern Cape, South Africa palynological evidence from three coastal wetlands
Despite significant advances in palaeoenvironmental research in southern Africa, the late Quaternary palaeoenvironmental history of the region remains incomplete as palaeoclimatic proxy records are temporally and spatially discontinuous. The southern Cape is a key focus area within this region as …
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The palaeoenvironments and stratigraphy of the Lincolnshire Limestone Formation (Middle Jurassic: Bajocian) of Northamptonshire and southern Lincolnshire
The Lincolnshire Limestone Formation, which crops out in eastern England from the Humber south for over 100 kilometres, is well exposed in the study area in the quarries of Cowthick, Clipsham, Copper Hill and Brauncewell. Nine members recognised by previous authors in this formation can be …
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Avian fauna, palaeoenvironments and palaeoecology in the late quaternary of the Western and Southern Cape, South Africa
Avian remains in coastal archaeological samples from Eland's Bay Cave, Die Kelders Cave 1 and Nelson Bay Cave in the Cape Province, South Africa, cover the periods between 80 000 and 40 000 B.P. and 18 000 and 300 B.P. Results of modern comparative surveys indicate that beached birds provide a …
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Revisiting the palaeoenvironments of the South African hominid-bearing Plio Pleistocene sites : new isotopic evidence from Sterkfontein
This thesis offers a revised palaeoenvironmental reconstruction of South African PlioPleistocene sites based on δ¹³C and δ¹⁸O isotopes extracted from enamel of fossil fauna. New isotopic results from Sterkfontein Members 4 and 5 are reported to supplement existing data from Makapansgat and …
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Late quaternary vegetation history and palaeoenvironments of the Cederberg Mountains, South Africa : evidence from hyrax (Procavia capensis) middens
Rock hyrax (Procavia capensis) middens have been identified as excellent sources ofpalaeoenvironmental information in arid and semi-arid areas, and have been successfully used in various parts of southern Africa. Hyrax middens from the De Rif site in theCederberg Mountains of the south-western Cape …
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Holocene vegetation and palaeoenvironments of the Southern Cederberg mountains of South Africa : palynological evidence from fossil hyrax (Procavia) dung middens
Late Quaternary vegetation and palaeoenvironments are relatively easy to reconstruct in humid regions as polled traps (swamps and peat bogs) there are usually abundant. However arid and semi-arid regions (such as southern Africa) lack fossil pollen because of the scarcity of pollen preserving …
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The palynology, palynofacies and palaeoenvironment of the early cretaceous Weald clay of Southeast England
… content in the Weald Clay represent particular palaeoenvironments.
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Life after extinction: palaeoenvironments of the earliest Triassic lower Katberg formation, including the origin of Lystrosaurus Bonebeds from the Karoo Basin, South Africa
This study argues for the formation of bonebeds by aggregation of sub-adult Lystrosaurus during extended episodic periods of extreme climatic conditions, such as cold or drought, in the earliest Triassic Karoo Basin.
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Late Quaternary palaeoenvironments and Middle-Late Stone Age habitat preferences in the Nakuru-Naivasha Basin, Kenya: phytolith-based evidence from the site of Prospect Farm
The Central Rift Valley of East Africa has proven to be a key region for our understanding the emergence and diversification of our species. Genetic, fossil, archaeological, and palaeoclimatic evidence suggest that mosaic refugia may have existed here during the late Quaternary period. Such …
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The taphonomy of a micromammalian faunal assemblage from the Saldanha Bay Yacht Club : a contribution to the study of the South African west coast palaeoenvironments
This thesis provides a broad outline of the effect of taphonomic and ecological processes on the accumulation and transformation of micromammalian faunal assemblages, and the importance of the signatures left behind by these processes in the reconstruction of ancient ecosystems. Micromammalian …
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Palaeoenvironments and position of the Precambrian–Cambrian boundary within the lower Vanrhynsdorp Group of South Africa: sedimentary facies analysis, U-Pb series zircon geochronology and micropalaeontology
The Vanrhynsdorp Group is a mainly fluvio-marine siliclastic succession that outcrops in the northwestern part of South Africa. The critical Precambrian-Cambrian boundary falls within the group, however the depositional environments across the boundary, its exact stratigraphic position and nature …
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