- pyroclastic deposits
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пирокластические отложения
English-Russian dictionary of geology. 2011.
pyroclastic deposits
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Pyroclastic rock — Pyroclastic rocks or pyroclastics (derived from the Greek πῦρ , meaning fire, and κλαστός , meaning broken) are clastic rocks composed solely or primarily of volcanic materials. Where the volcanic material has been transported and reworked… … Wikipedia
pyroclastic surge deposit — GLOSSARY OF VOLCANIC TERMS Pyroclastic deposits that are left by pyroclastic surges. These deposits mantle topographic features but also generally thicken within topographic depressions. These deposits are generally well sorted, and are enriched… … Glossary of volcanic terms
pyroclastic fall deposit — GLOSSARY OF VOLCANIC TERMS Volcaniclastic (pyroclastic) deposits formed from the rain out of clasts through the atmosphere from an eruption jet and/or plume during an explosive eruption (Houghton et al., 2000, p. 555). Fall deposits typically… … Glossary of volcanic terms
pyroclastic flow — ▪ volcanism in a volcanic eruption, a fluidized mixture of hot rock fragments, hot gases, and entrapped air that moves at high speed in thick, gray to black, turbulent clouds that hug the ground. The temperature of the volcanic gases can… … Universalium
Pyroclastic fall — A pyroclastic fall is a uniform deposit of material which has been ejected from an eruption or plume such as an ash fall or tuff. Pyroclastic flows occur relatively spontaneously in the geological time scale and are great indicators of time.… … Wikipedia
pyroclastic flow deposit — GLOSSARY OF VOLCANIC TERMS Pyroclastic (volcaniclastic) deposits that are left by pyroclastic flows (Cas and Wright, 1987, p. 96). The deposits are usually topographically controlled (infilling valleys and topographic depressions), massive, and… … Glossary of volcanic terms
Pyroclastic shield — In volcanology, a pyroclastic shield or terrestrial ignimbrite shield is an uncommon type of shield volcano. Unlike most shield volcanoes, pyroclastic shields are formed mostly of pyroclastic and highly explosive eruptions rather than relatively… … Wikipedia
pyroclastic — ALASKA VOLCANO OBSERVATORY GLOSSARY Pertaining to fragmented (clastic) rock material formed by a volcanic explosion or ejection from a volcanic vent. GLOSSARY OF VOLCANIC TERMS Refers to processes resulting from the explosive fragmentation of a… … Glossary of volcanic terms
volcano — /vol kay noh/, n., pl. volcanoes, volcanos. 1. a vent in the earth s crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. 2. a mountain or hill, usually having a cuplike crater at the summit,… … Universalium
Mount Vesuvius — This article is about the mountain/volcano in Italy. For other uses, see Vesuvius (disambiguation). Mount Vesuvius Monte Vesuvio … Wikipedia
Mount Pinatubo — The eruption column of Mount Pinatubo on June 12, 1991, three days before the climactic eruption. Elevation … Wikipedia
