- pumice flow
- 浮石流
English-Chinese geology dictionary (英汉地质大词典). 2013.
pumice flow
Look at other dictionaries:
pumice — a) [ soils ] Volcanic fragments e 2 mm in diameter (i.e., retained upon a standard # 10 sieve), or coherent rock layers (pumice flow), made of light colored, vesicular, glassy rock commonly having the composition of rhyolite. The material… … Glossary of landform and geologic terms
Pumice — is a textural term for a volcanic rock that is a solidified frothy lava composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. It is commonly, but not exclusively of silicic or… … Wikipedia
pumice — pumiceous /pyooh mish euhs/, adj. pumicer, n. /pum is/, n., v., pumiced, pumicing. n. 1. Also called pumice stone. a porous or spongy form of volcanic glass, used as an abrasive. v.t. 2. to rub, smooth, clean, etc., with pumice. [bef. 1000; < L… … Universalium
pyroclastic flow — ALASKA VOLCANO OBSERVATORY GLOSSARY A dense, hot, chaotic avalanche of rock fragments, gas, and ash that travels rapidly away from an explosive eruption column, down the flanks of the volcano (synonymous with ash flow ). Pyroclastic flows move at … Glossary of volcanic terms
Pyroclastic flow — Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984 … 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
ash flow — (not preferred see pyroclastic flow, pyroclastic surge) A highly heated mixture of volcanic gases and ash, traveling down the flank of a volcano or along the surface of the ground; produced by the explosive disintegration of viscous lava in … Glossary of landform and geologic terms
pyroclastic flow — A fast density current of pyroclastic material, usually very hot, composed of a mixture of gasses and a high concentration of pyroclastic particles in a variety of sizes and composition (ash, pumice, scoria, lava fragments, etc.); produced by… … Glossary of landform and geologic terms
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
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 Edziza volcanic complex — Mount Edziza, one of the main volcanoes of the Mount Edziza volcanic complex Elevation … Wikipedia
