Cryptotephras
Cryptotephra extraction techniques are relatively simple to execute but somewhat labour-intensive. The most commonly applied techniques largely involve removing the vast majority of the host material to concentrate the fine-grained glass shards. WebApr 14, 2024 · Cryptotephras: Refers to distal tephra deposits, preserved as glass shard and/or crystal concentrations in peat bogs, lake, marine, or aeolian sediments, or ice-cores, or soils, that are ...
Cryptotephras
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WebFeb 1, 2014 · Cryptotephra layers have been widely used as chronological markers, often alongside radiocarbon dating, within palaeoenvironmental studies of peatlands (e.g. … WebThe alkaline and rhyolitic cryptotephras made up only 2-17% and 22-24%, respectively, of the sediment on weigh basis. The high sensitivity of this method stems from the significant …
WebJan 1, 2015 · Cryptotephras comprise concentrations of ash-sized glass shards or crystals, or both, usually <150 μm in diameter, preserved in sediments (including ice), in cave deposits, or in soils or paleosols (Lowe, 2011; Lane et al., 2014 ). WebMar 30, 2015 · Cryptotephra extraction techniques are relatively simple to execute but somewhat labour-intensive. The most commonly applied techniques largely involve removing the vast majority of the host material to concentrate the fine-grained glass shards.
WebSep 21, 2024 · Tephra layers offer opportunities for precise correlation of palaeoenvironmental sequences, as well as windows into the eruption frequency of regional volcanoes and the dispersal of volcanic ash. Keywords central Kenyan Rift, cryptotephra, Holocene palaeoenvironment, tephra, volcanism Access Options Institutional Login WebJan 20, 2024 · Cryptotephrochronology, the use of hidden, diminutive volcanic ash layers to date sediments, has rarely been applied outside western Europe but has the potential to …
WebNov 3, 2024 · An Azorean origin of cryptotephras found in distal areas such as North Africa, the British Isles and Greenland has been suggested, but proximal data from the Azores are scarce and the correlations have only been tentative. These tephras have a traychtic composition, which excludes an Icelandic origin.
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