Deposit of material ejected from a volcanic eruption
A pyroclastic fall deposit is a uniform deposit of material which has been ejected from a volcanic eruption or plume such as an ash fall or tuff.[1] Pyroclastic fallout deposits are a result of:
Ballistic transport of ejecta such as volcanic blocks, volcanic bombs and lapilli from volcanic explosions
Deposition of material from convective clouds associated with pyroclastic flows such as coignimbrite falls
Ejecta carried in gas streaming from a vent. The material under the action of gravity will settle out from an eruption plume or eruption column
Ejecta settling from an eruptive plume or eruption column that is displaced laterally by wind currents and is dispersed over great distances
^Cas, R. A. F.; Wright, J. V. (February 6, 1988). Cas, R. A. F.; Wright, J. V. (eds.). Volcanic Successions Modern and Ancient: A geological approach to processes, products and successions. Springer Netherlands. pp. 128–174. doi:10.1007/978-94-009-3167-1_6 – via Springer Link.
A pyroclasticfall deposit is a uniform deposit of material which has been ejected from a volcanic eruption or plume such as an ash fall or tuff. Pyroclastic...
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively...
Look up pyroclastic in Wiktionary, the free dictionary. Pyroclast, Pyroclastic or Pyroclastics may refer to: Pyroclast, or airborne Tephra fragments Pyroclastic...
topography-draping pyroclasticfall layers, and by pyroclastic density currents (PDCs) (including pyroclastic flows and pyroclastic surges), from which...
A pyroclastic surge is a fluidised mass of turbulent gas and rock fragments that is ejected during some volcanic eruptions. It is similar to a pyroclastic...
paucity of associated Plinian fall deposits indicates that pyroclastic shields are characterized by low Plinian columns. Pyroclastic shields are commonly known...
generated approximately 430 km3 (100 cu mi) of pyroclasticfall deposits, 320 km3 (77 cu mi) of pyroclastic density current (PDC) deposits (mostly ignimbrite)...
large cone-shaped volcanoes made up of lava flows, explosively erupted pyroclastic rocks, and igneous intrusives that are typically centered around a cylindrical...
devastating nearby areas with heavy pyroclasticfall which deposited tephra on Meager's steep flanks. A pyroclasticfall deposit up to 80 m (260 ft) thick...
Abrams, Lewis J.; Sigurdsson, Haraldur (2007). "Characterization of pyroclasticfall and flow deposits from the 1815 eruption of Tambora volcano, Indonesia...
kinetic sieving. It is also observed in aeolian processes, such as in pyroclasticfall deposits. These deposition processes are examples of granular convection...
recently active from 1990 to 1995, and a large eruption in 1991 generated a pyroclastic flow that killed 43 people, including three volcanologists. Its highest...
rocks. They can occur in welded pyroclasticfall deposits and in ignimbrites, which are the deposits of pumiceous pyroclastic density currents. The name fiamme...
in 2014, which shows areas threatened by lahars, lava flows, pyroclasticfall, pyroclastic flows, tephra fallout and volcanic bombs. According to the map...
from the caldera-wall fissure zones, pyroclastics and lavas from intracaldera cones, and recent pyroclasticfall deposits on the outer cone. Eruptive...
of kimberlite from tephra cones and/or extra-crater fall and surge deposits. The pyroclasticfall deposits are poorly sorted and massive, while the surge...
About 10% of the eruption fatalities were from hot pyroclastic flows and falling tephra. The pyroclastic flows travelled 40 km (25 mi) across the Sunda Strait...
caused by pyroclastic flows and lahars, deadly hazards that often accompany explosive eruptions of subduction-zone stratovolcanoes. Pyroclastic flows are...
core 13 by 12 kilometres (8.1 mi × 7.5 mi) area of the volcano but pyroclasticfall material covers much of the summit area. The massif rises about 2 kilometres...
forming Cone B and a maar. Apart from the flood, base surges and pyroclasticfall took place outside of the caldera. Cone A began to grow after the 1817...
of loose pyroclastic fragments, such as volcanic clinkers, volcanic ash, or scoria that has been built around a volcanic vent. The pyroclastic fragments...
the 1980 eruption of Mount St. Helens), produced major pyroclasticfall and large pyroclastic flows that covered 10,000 km2 (3,900 sq mi) with over 50 cm...
include gravity flow of molten lava at the surface, gravity flow or fall of pyroclastics through the air, as well as the redistribution and transportation...
and ash reaching the stratosphere, although the event also included pyroclastic flows associated with Pelean eruptions. The event destroyed several Roman...
areas were devastated by heavy pyroclasticfall when parts of the Plinian column collapsed. Later, a series of pyroclastic flows were erupted and travelled...
began to fall, blanketing the area. Rescues and escapes occurred during this time. At some time in the night or early the next day, pyroclastic surges in...
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