Tephra

Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground they remain as tephra unless hot enough to fuse together into pyroclastic rock or tuff. ==Overview== The distribution o...
Found on http://en.wikipedia.org/wiki/Tephra

tephra

(from the article `pyroclastic flow`) The term tephra as originally defined was a synonym for pyroclastic materials, but it is now used in the more-restricted sense of pyroclastic ...
Found on http://www.britannica.com/eb/a-z/t/26

tephra

A general term for all pyroclastic material.
Found on https://www.encyclo.co.uk/local/22327

Tephra

A general term for pyroclastic material ejected from a volcano. It includes ash, dust, bombs, and other types of fragments.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

tephra

Any rock material produced by a volcano.
Found on http://cdiac.ornl.gov/glossary.html

tephra

ash and debris ejected by volcano
Found on http://phrontistery.info/t.html

Tephra

Fragmented rock material ejected by a volcanic explosion. Also called pyroclastic material.
Found on http://www.physicalgeography.net/physgeoglos/t.html

Tephra

Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Found on http://midju.tripod.com/glossary.html

Tephra

Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Found on http://www.encyclo.co.uk/local/21455

Tephra

Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Found on http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html

Tephra

Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Found on http://volcano.oregonstate.edu/glossary/1

tephra

Rock fragments and particles ejected by a volcanic eruption.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

tephra

Tephra erupted by Mount St. Helens on 18 May 1980 ranging in size from ash (left 2 piles) to lapilli (right 2 piles). Credit: D. Wieprecht / U.S. Geological Survey Volcanic ash falls to ground and creates darkness, Mount Pinatubo in the Philippines. Credit: E. Wolfe / U.S. Geological Survey ...
Found on http://www.daviddarling.info/encyclopedia/T/tephra.html
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