Global ETD Search
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Showing 1 to 7 of 7 for “"Ediacara"”.
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The Mall Bay Formation (Ediacaran) and the Protracted Onset of the Gaskiers Glaciation in Newfoundland, Canada
… large, complex, soft-bodied, fossils of the Ediacara biota. The Gaskiers glaciation is generally regarded as being short-lived and confined to the stratigraphic extent of the Gaskiers Formation in eastern Newfoundland, Canada. New research on the underlying km-thick, siliciclastic Mall Bay …
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Contributions to the Neoproterozoic Geobiology
… 1, a comprehensive quantitative analysis of the Ediacara fossils indicates that the oldest Ediacara assemblage "the Avalon assemblage" already encompassed the full range of Ediacara morphospace. A comparable morphospace range was occupied by the subsequent White Sea and Nama assemblages, although …
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Paleoecology and Taphonomy of Ediacaran macrofossils from the Khatyspyt Formation, Olenek Uplift, Siberia
The Ediacaran Period (635 – 541 Ma) is a critical transition in the history of the Earth and life. It is marked by the appearance of enigmatic Ediacara-like fossils and macroalgae, which had existed since the early Proterozoic, but started to diversify morphologically and ecologically during this …
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Integrated High-resolution Stratigraphy of the Doushantuo Formation, South China
The Ediacaran Period (635-542 Ma) just preceded the radiation of animals, yet witnessed profound changes in biological innovation, including the first appearance of large spiny acritarchs called the acanthomorphic acritarch, followed by the radiation of the Ediacara biota (575-542 Ma), and earliest …
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Contributions to late Ediacaran geobiology in South China and southern Namibia
The Ediacaran, particularly the late Ediacaran-Cambrian (E-") boundary (551-541 Ma), has been noted as a major time of biological and biochemical transition, including: the rise of predators, the emergence of skeletons, the radiation of bioturbators, and large fluctuations in oceanic chemical …
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Ediacaran Fronds from South Australia and Newfoundland
The Ediacara biota (575-539 Ma) represents a seminal event in the evolution of life, the first abundant appearance of large, architecturally complex, soft-bodied organisms after three billion years of mostly microbial evolution. Fronds occupied all tiers of the Ediacaran ecosystem and were the …
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Trends in Eukaryote Body Size in an Ecological and Evolutionary Context
… significantly following the first appearance of Ediacara organisms and gradually rose during the Cambrian. Morphological disparity increased a half billion years before the first taxonomic radiation. Morphological disparity decreased significantly during the snowball earth events and upon the …