Results 151 to 160 of about 21,586 (203)
Groundwater flow system of the Abijata-Langano-Ziway lakes basin, Ethiopia. [PDF]
HeliyonAbera D, Berehanu B, Ayenew T.
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Upper holocene tephro-chronostratigraphy of Irazú Volcano, Costa Rica. [PDF]
Sci RepCampos-Durán D, Alvarado GE, Martí J.
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Nature, 1977
THE mobility of pyroclastic flows has been described as spectacular1, in particular because of their ability to surmount obstacles in their path. It is relatively easy to estimate the minimum velocities required to climb a given height, if frictional losses are ignored.
P. W. FRANCIS, M. C. W. BAKER
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THE mobility of pyroclastic flows has been described as spectacular1, in particular because of their ability to surmount obstacles in their path. It is relatively easy to estimate the minimum velocities required to climb a given height, if frictional losses are ignored.
P. W. FRANCIS, M. C. W. BAKER
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Pyroclastic flows modelling using cellular automata
Computers & Geosciences, 2006Cellular automata (CA) and derived computational paradigms represent an alternative approach to differential equations to model and simulating complex fluid dynamical systems, whose evolution depends on the local interactions of their constituent parts.
AVOLIO M. V +5 more
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1984
Pyroclastic flows are volcanically produced hot, gaseous, particulate density currents. Their deposits offer unparalleled opportunities to estimate minimum volumes of near-surface magma chambers as well as vertical chemical, mineralogical, and thus temperature and pressure distributions within the magma columns immediately prior to eruption.
Richard V. Fisher, Hans-Ulrich Schmincke
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Pyroclastic flows are volcanically produced hot, gaseous, particulate density currents. Their deposits offer unparalleled opportunities to estimate minimum volumes of near-surface magma chambers as well as vertical chemical, mineralogical, and thus temperature and pressure distributions within the magma columns immediately prior to eruption.
Richard V. Fisher, Hans-Ulrich Schmincke
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Models for pyroclastic surges and pyroclastic flows
Journal of Volcanology and Geothermal Research, 1979Pyroclastic surges are low-concentration turbulent flows that form in at least three ways: (1) eruption column collapse (ground surge, base surge), (2) elutriation from the top of a moving pyroclastic flow (ash cloud), and (3) directly from a crater without an accompanying vertical eruption column.∗ Ground surge deposits occur at the base and ash cloud
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On pyroclastic flow emplacement
Journal of Geophysical Research: Solid Earth, 1993In this note I investigate some theoretical characteristics of pyroclastic flow deposits, assuming that these flows are Bingham fluids, probably the simplest non‐Newtonian fluids. Pyroclastic flows are modeled as laminar debris flows moving on an inclined plane, and their physics is discussed within the classical framework of lubrication theory.
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Pyroclastic Flow Hazard at Volcán Citlaltépetl
Natural Hazards, 2004Volcan Citlaltepetl (Pico de Orizaba) with an elevation of 5,675 m is the highest volcano in North America. Its most recent catastrophic events involved the production of pyroclastic flows that erupted approximately 4,000, 8,500, and 13,000 years ago. The distribution of mapped deposits from these eruptions gives an approximate guide to the extent of ...
Michael F. Sheridan +3 more
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CLASSIFICATION OF PYROCLASTIC FLOWS
International Geology Review, 1961Pyroclastic flow is defined as the flow of high-temperature, essential, fragmental materials. This is synonymous with the nuee ardente in the broad sense. Three modes of emplacement of high-temperature, essential, solid (or liquid) materials after the ejection from the crater may be recognized: 1) Projection of fragments from the crater by explosive ...
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