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
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
Complex circular subsidence structures in tephra deposited on large blocks of ice: Varða tuff cone, Öræfajökull, Iceland [PDF]
, 2016 Several broadly circular structures up to 16 m in diameter, into which higher strata have sagged and locally collapsed, are present in a tephra outcrop on southwest Öræfajökull, southern Iceland.
A Geyer +61 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
Long-range sediment transport in the world’s oceans by stably stratified turbidity currents [PDF]
, 2016 Peer reviewedPublisher ...
Kneller, Benjamin +3 more
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Sourcing of Miocene accretionary lapilli on ‘Eua, Tonga; atypical dispersal distances and tectonic implications for the central Tonga Ridge [PDF]
, 2016 Volcaniclastics hosting accretionary lapilli on the Tonga Ridge were sourced from the remnant Lau Ridge, prior to Lau back-arc basin opening. For the ‘Eua occurrences, an atypical dispersal distance of not less than 70 km is estimated, partly arising ...
Beard, Andy, Cunningham, John
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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
doaj +1 more source
ASHEE: a compressible, equilibrium-Eulerian model for volcanic ash plumes [PDF]
, 2015 A new fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas-particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and
Berselli, Luigi Carlo +2 more
core +4 more sources