Results 21 to 30 of about 1,257 (218)
Generation of Overspill Pyroclastic Density Currents
, 2021 Pyroclastic density currents (PDCs) are composed of hot gas and glass like ash or rocks. They can be very mobile, flowing over obstacles with ease but their pathway is often controlled by the topography they flow over. When a PDC is confined to valley it increases the distance it can travel but the PDC can overflow from the valley unexpectedly ...
Allison Kubo Hutchison, Josef Dufek
openaire +2 more sources
Characterising pyroclastic density current grainsize data [PDF]
, 2023 Grainsize data is used across volcanology to aid interpretation of deposit trends and inform transport and depositional process. Collected grainsize data and the way it is presented varies for different processes, for example tephra fall versus ...
Breard, Eric +2 more
core
Large-scale volcanic deposit fluidization by dilute pyroclastic density currents
, 2023 co-auteur étrangerInternational audienceThere is increasing evidence that fine-grained deposits of pyroclastic density currents can be remobilized on a large scale, resulting in concentrated flows.
Kelfoun, Karim, Proaño, Antonio
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, 2023 The VEI 6, Tierra Blanca Joven pyroclastic sequence (30–90 km3 DRE volume), erupted from Ilopango caldera, El Salvador, in 431 CE, is the product of one of the largest eruptions of the last two millennia.
Brown, Richard J. +13 more
core +1 more source
A bedform phase diagram for dense granular currents
Nature Communications, 2020 In this study, Smith and colleagues employ analogue experiments to show the controlling parameters on sediment bedforms in pyroclastic density current deposits. The findings are applied and validated on natural deposits.
Gregory Smith +7 more
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Frontiers in Earth Science, 2020 Aluto volcano, in the Main Ethiopian Rift, is a peralkaline caldera system, which comprises conglomerations of rhyolite (obsidian) lavas and enigmatic pumice cones.
Ben Clarke +5 more
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Earth, Planets and Space, 2019 Three lava flows (Buenavista, Xalitzintla and Nealtican) and pyroclastic density currents (Lorenzo and Pink Pumice) from two Popocatepetl Plinian eruptions were sampled for paleomagnetic dating.
Nayeli Pérez-Rodríguez +3 more
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Geosciences, 2021 In the aftermath of pyroclastic density current-dominated eruptions, lahars are the main geomorphic agent, but at the decadal scale, different sets of processes take place in the volcanic sediment cascade.
Christopher Gomez +5 more
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A Geologic Si‐O‐C Pathway to Incorporate Carbon in Silicates
Geophysical Monograph Series, Page 47-54., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Alexandra Navrotsky +2 more
wiley +1 more source
Dynamic Statistical Models for Pyroclastic Density Current Generation at Soufrière Hills Volcano
Frontiers in Earth Science, 2018 To mitigate volcanic hazards from pyroclastic density currents, volcanologists generate hazard maps that provide long-term forecasts of areas of potential impact. Several recent efforts in the field develop new statistical methods for application of flow
Robert L. Wolpert +2 more
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