noun Etymology: New Latin, from Greek, ashes; akin to Sanskrit dahati it burns — more at foment Date: circa 1944 solid material ejected into the air during a volcanic eruption; especially ash II,2b

New Collegiate Dictionary. 2001.

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  • 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

  • Tephra — (gr.), so v.w. Asche …   Pierer's Universal-Lexikon

  • Tephra —   [griechisch »Asche«] die, , Petrographie: Sammelbezeichnung für alle unverfestigten vulkanischen Lockerprodukte (Aschen, Lapilli, Bomben u. a.). Aus ihnen entstehen die Pyroklastite …   Universal-Lexikon

  • tephra — [tef′rə] pl.n. [< Gr: see TEPHRITE] [with sing. or pl. v.] clastic volcanic materials, as dust, ashes, or pumice, ejected during an eruption and carried through the air before deposition …   English World dictionary

  • tephra — ALASKA VOLCANO OBSERVATORY GLOSSARY Any type of rock fragment that is forcibly ejected from the volcano during an eruption. GLOSSARY OF VOLCANIC TERMS A general term used by volcanologists to describe all fragmental volcanic ejecta produced… …   Glossary of volcanic terms

  • Tephra — Fossile pyroklastische Brekzie, Grand Teton Nationalpark, Wyoming Als Pyroklastische Sedimente, auch pyroklastische Ablagerungen oder Pyroklastika, werden in der Vulkanologie Ablagerungen bezeichnet, die zu mehr als 75% aus Pyroklasten bestehen.… …   Deutsch Wikipedia

  • Tephra — Éjecta Traduction à relire Piroclasto → …   Wikipédia en Français

  • Téphra — Éjecta Traduction à relire Piroclasto → …   Wikipédia en Français

  • tephra — /tef reuh/, n. (used with a pl. v.) clastic volcanic material, as scoria, dust, etc., ejected during an eruption. [1960 65; < Gk téphra (sing.) ashes] * * * …   Universalium

  • Tephra — Te|phra* die; <aus gr. téphra »Asche«> Sammelbez. für vulkanische Lockerstoffe …   Das große Fremdwörterbuch

  • tephra —    A collective, general term for any and all clastic materials, regardless of size or composition, ejected from a vent during a volcanic eruption and transported through the air; including ash [ volcanic; < 2 mm ], blocks [ volcanic; > 64… …   Glossary of landform and geologic terms

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