pyroclastic fall

GLOSSARY OF VOLCANIC TERMS
The "rain-out" of pyroclasts through the atmosphere from an eruption jet or eruption plume during an explosive volcanic eruption (Wilson and Houghton, 2000, p. 545; Houghton et al, 2000, p. 555).

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • 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 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 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 flow — Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984 …   Wikipedia

  • Pyroclastic surge — A pyroclastic surge is a fluidized mass of turbulent gas and rock fragments which is ejected during some volcanic eruptions. It is similar to a pyroclastic flow but contains a much higher proportion of gas to rock, which makes it more turbulent… …   Wikipedia

  • 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 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

  • Mount Meager — The Mount Meager volcanic complex rising above the Pemberton Valley. Summits left to right are Capricorn Mountain, Mount Meager proper and Plinth Peak …   Wikipedia

  • Mount Cayley volcanic field — Coordinates: 50°07′13″N 123°17′26″W / 50.12028°N 123.29056°W / 50.12028; 123.29056 …   Wikipedia

  • Oruanui eruption — A large eruption column during the Oruanui eruption as it may have appeared from space The Oruanui eruption of New Zealand s Taupo Volcano was the world s largest known eruption in the past 70,000 years, with a Volcanic Explosivity Index of 8. It …   Wikipedia

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