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Combined effects of wind and column mass distribution on tephra fall deposits
Environmental Software, 1990Abstract A 2D1/2 model of volcanic ashes (tephra) dispersion, based on an analytical solution of the advection-diffusion equation, is presented. By this model the correlation between a double maximum in thickness and a punctual bimodal size distribution in plinian deposit of volcanic eruptions is outlined for the first time.
P. Armienti, G. Macedonio, M.T. Pareschi
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A varve-based calibration of the Bridge River tephra fall
Canadian Journal of Earth Sciences, 1995A 1 cm thick layer of Bridge River tephra is preserved in a core of varved lake sediments recovered from Hector Lake, Alberta. The varve sequence extends from the core top to well below the tephra layer and has bseen calibrated to calendar years. A varve count yields a calendar age of 2332 BP for the ash layer, with a potential error of about ±50 ...
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Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska
Quaternary Research, 2007AbstractTephra-fall deposits from Cook Inlet volcanoes were detected in sediment cores from Tustumena and Paradox Lakes, Kenai Peninsula, Alaska, using magnetic susceptibility and petrography. The ages of tephra layers were estimated using 21 14C ages on macrofossils.
Christian S. de Fontaine +5 more
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Tephra-fall deposits in the Sleat Group (Torridonian), Isle of Skye, Scotland
Geological Magazine, 2005Tephra-fall deposits in the Late Mesoproterozoic Sleat Group (Torridonian) from Skye, Scotland, are described for the first time. Two individual beds occur within the Loch na Dal Formation which represents sedimentation in a shallow marine environment.
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The Toba supervolcanic eruption: Tephra-fall deposits in India and paleoanthropological implications
2007The 74,000 year-old supereruption of the Toba volcano, located in northern Sumatra, is recognized as one of Earth’s largest known eruptions and was certainly the largest of the Quaternary period (Smith and Bailey, 1968). It is hypothesized to have led to both global climatic deterioration (Rampino et al., 1988; Rampino and Self, 1992, 1993a) and the ...
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Plant Responses in Forests of the Tephra-Fall Zone
2006Joseph A. Antos, Donald B. Zobel
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Three empirical methods for the calculation of distal volume of tephra-fall deposits
Journal of Volcanology and Geothermal Research, 2005Roberto Sulpizio
exaly
INTERPRETING A HEAVILY BIOTURBATED TEPHRA FALL DEPOSIT AT KINGS BOWL, IDAHO
Geological Society of America Abstracts with Programs, 2016Allison Trcka +2 more
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