pyroclast
Look at other dictionaries:
pyroclast — py·ro·clast … English syllables
pyroclast — /paɪroʊˈklæst/ (say puyroh klast) noun Geology a fragment of broken rock which has been ejected during a volcanic explosion, as obsidian, pumice, etc. {pyro + clast(ic)} …
pyroclast — ˈpīrōˌklast noun ( s) Etymology: pyr + clast : a fragment of detrital volcanic material that has been expelled aerially from a vent … Useful english dictionary
Pyroclastic flow — Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984 … Wikipedia
Tephra — is air fall material produced by a volcanic eruption regardless of composition or fragment size. [This is the broad definition of tephra (Greek tephra , ash ) proposed by the Icelandic volcanologist Sigurdur Thorarinsson in 1954, in connection… … Wikipedia
Mocho-Choshuenco — In the left; the Choshuenco and in the right the Mocho. A view from the way to the mountain shelter (from the west) to the volcano in September 2006. Elevation … Wikipedia
volcanic block — A pyroclast that was ejected in a solid state; it has a diameter greater than 64 mm. Compare: cinders, lapilli, tephra, volcanic bomb. GG … Glossary of landform and geologic terms
volcanic bomb — A pyroclast > 64 mm in at least one dimension that was ejected while still viscous and solidified into its rounded form in flight. Compare: cinders, lapilli, tephra, volcanic block. GG … Glossary of landform and geologic terms
spatter bomb — GLOSSARY OF VOLCANIC TERMS A glassy pyroclast greater than 64mm in diameter that takes on a fluidal shape by the force of ejection (Vergniolle and Mangan, 2000, p. 447) … Glossary of volcanic terms
pyroclastic Geology — [ˌpʌɪrə(ʊ) klastɪk] adjective of or denoting rock fragments or ash erupted by a volcano, especially as a hot, dense, destructive flow. noun (pyroclastics) pyroclastic material. Derivatives pyroclast noun … English new terms dictionary
