Temporal and spatial evolution of a waxing then waning catastrophic density current revealed by chemical mapping [PDF]
, 2013 We reconstruct the behavior of a catastrophic sustained radial pyroclastic density current as it waxed then waned during its brief lifespan. By subdividing the deposit into 8 time slices using a chemical tracer, we show that the sustained current ...
Barry, Tiffany L. +2 more
core +1 more source
Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]
, 2015 We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note—we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Palladino, Danilo Mauro +3 more
core +1 more source
Long-runout pyroclastic density currents: Analysis and implications
Geology, 2022 Abstract Pyroclastic density currents are hazardous, ground-hugging, hot mixtures of gas and solid particles produced by volcanoes. Currents generated by the largest explosive eruptions have traveled distances on the order of 100 km, and their devastating impact has repeatedly marked Earth's geologic history.
Roche, Olivier +3 more
openaire +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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
Relation between dry granular flow regimes and morphology of deposits: formation of levees in pyroclastic deposits [PDF]
, 2004 Experiments on dry granular matter flowing down an inclined plane are performed in order to study the dynamics of dense pyroclastic flows. The plane is rough, and always wider than the flow, focusing this study on the case of laterally unconfined (free ...
Felix, Gwenaelle, Thomas, Nathalie
core +5 more sources
, 2020 One of the greatest challenges in volcanology is extracting information from volcanic deposits that inform the conditions at the time of emplacement.
P. Zrelak +4 more
semanticscholar +1 more source