Results 151 to 160 of about 5,469 (201)

An almost complete cranium of <i>Asoriculus gibberodon</i> (Petényi, 1864) (Mammalia, Soricidae) from the early Pliocene of the Jradzor site, Armenia. [PDF]

Swiss J Palaeontol
Bert H, Costeur L, Lazarev S, Schulz G, Vasilyan D, Maridet O.   +5 more
europepmc   +1 more source

Ongoing multiparameter unrest at the Montagne Pelée volcano on Martinique from 2019 to 2024. [PDF]

Sci Rep
Fontaine FR, Komorowski JC, Corbeau J, Burtin A, de Chabalier JB, Grandin R, Saurel JM, Agrinier P, Moune S, Jadelus F, Melezan D, Gabriel JG, Vidal C, Zimmermann B, Vaton D, Koziol J, Lavenaire JM, Moretti R, Lemarchand A, Labasque T, Blard PH, Tibari B, Zimmermann L, Aubaud C, Vergne J, Andrieu A, Filliaert A, Chilin-Eusebe E, Wahlgren SZ, Inostroza M, Métaxian JP, Potier A, Fernandez I, Robert V, Deroussi S, Carazzo G, Tait S, Vlastelic I, Jessop DE, Bonaimé S, Le Friant A, Chaussidon M, Michaud-Dubuy A, Retailleau L, Di Muro A, Allard P, Satriano C.   +46 more
europepmc   +1 more source

Evolution of the Neoproterozoic Kareim Basin, north Arabian - Nubian shield. [PDF]

Sci Rep
Sehsah H, Kirkland CL, Johnson TE, Abdel-Fattah ZA.   +3 more
europepmc   +1 more source

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The Fluid Mechanics of Pyroclastic Density Currents

Annual Review of Fluid Mechanics, 2016
Pyroclastic density currents are generated in explosive volcanic eruptions when gas and particle mixtures remain denser than the surrounding atmosphere. These mobile currents have a diversity of flow regimes, from energetic granular flows to turbulent suspensions.
Josef Dufek
openaire   +3 more sources

Pyroclastic density currents: state of the art and perspectives

Journal of Volcanology and Geothermal Research, 2014
Pyroclastic density currents (PDCs) are mixtures of two components, namely solid particles and fluid (gas) phase. They macroscopically behave as dense, multiphase gravity currents (flowing pyroclastic mixtures of particles and gas) immersed in a less dense, almost isotropic fluid (the atmosphere).
SULPIZIO, ROBERTO, DELLINO, Pierfrancesco, Doronzo DM, Sarocchi D.   +3 more
openaire   +5 more sources

Generation of Overspill Pyroclastic Density Currents in Sinuous Channels

Journal of Geophysical Research: Solid Earth, 2021
AbstractDue to their mobility, high velocities, and common occurrence, small‐volume pyroclastic density currents (PDCs) represent a major hazard around volcanoes. Small‐volume events are particularly sensitive to topography and channelization into drainage basins. Understanding the flow transition initiated by avulsion or overspill from valley confined
A. Kubo Hutchison, J. Dufek
openaire   +1 more source

Pyroclastic density currents

Geological Society, London, Special Publications, 1998
Abstract High-speed, gravity-driven flows of hot particles and gas are a common and highly destructive product of explosive volcanism. They range widely in nature from expanded, turbulent suspension currents formed by lateral blasts or by the fountaining of vertical eruption columns, to highly concentrated granular avalanches ...
openaire   +1 more source

Erosional characteristics and behavior of large pyroclastic density currents

Geology, 2012
Factors influencing the erosive behavior of large pyroclastic density currents (PDCs), both mainly massive and thinly stratified, are not well understood. To investigate the parameters influencing the erosive behavior of PDCs produced during the flowing phase of large, caldera-forming Plinian (Campanian Ignimbrite) and phreatoplinian (Neapolitan Yellow
SCARPATI, CLAUDIO, Perrotta A.
openaire   +2 more sources

Generation of air lubrication within pyroclastic density currents

Nature Geoscience, 2019
Pyroclastic density currents are highly dangerous ground-hugging currents from volcanoes that cause >50% of volcanic fatalities globally. These hot mixtures of volcanic particles and gas exhibit remarkable fluidity, which allows them to transport thousands to millions of tonnes of volcanic material across the Earth’s surface over tens to hundreds of ...
Gert Lube, Eric C. P. Breard, Jim Jones, Luke Fullard, Josef Dufek, Shane J. Cronin, Ting Wang   +6 more
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Density Stratification and Buoyancy Evolution in Pyroclastic Density Currents

Journal of Geophysical Research: Solid Earth
AbstractPyroclastic density currents (PDCs) are density‐stratified along their vertical axis, with the near‐bed portion being denser than the upper portion, resulting from particle settling and ambient air entrainment at current margins. Whereas vertical density stratification likely influences mixing, sedimentation, and buoyancy of PDCs, many depth ...
Sean B. O’Donnell, Blair A. Johnson, Eric C. P. Breard, James L. Buttles, James E. Gardner, David Mohrig, Josef Dufek   +6 more
openaire   +1 more source