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 4 of 4 for “"cryptotephra"”.
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Long-range impacts of the ~74 ka Toba super eruption
… understanding of the Toba impact by utilising cryptotephra as an absolute event marker of the eruption, resolving an age uncertainty issue that is persistent in proxy-based research in Quaternary sciences, eventually to be combined with palaeoecological methods for climatic and environmental …
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Explosive Volcanism in the Kenyan Rift: A Tephrostratigraphic Perspective
… (Kenya), are investigated for the presence of cryptotephra deposits to provide better constraints on eruption histories. The complete Holocene tephrostratigraphy for Lake Chala includes 26 cryptotephra deposits and two visible tephra layers deposited between 13,350 and 63 cal yrs BP. …
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Tree-limit ecotonal response to Holocene climate change in the Scandes Mountains of west-central Sweden
… At Lake Stentjärn, three Holocene cryptotephra horizons were detected, one of which was geochemically correlated with the Icelandic Askja-1875 eruption. At Klocka Bog, at least seven cryptotephra horizons were recorded in the two peat profiles, and five of the horizons were …
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Resolving abrupt palaeoenvironmental changes in a lake sediment sequence from Ioannina, northwest Greece
… as well as the Holocene Vallone del Gabellotto cryptotephra marker (E-1; ca. 8.3 ka BP). Evidence for repeated remobilisation and redeposition of CI/Y-5 tephra material is outlined, and the potential mechanisms and impacts of sediment reworking in lake environments are examined. Bayesian …