Pertaining to fragmented (clastic) rock material formed by a volcanic explosion or ejection from a volcanic vent
Pertaining to clastic rock material formed by volcanic explosion or aerial expulsion from a volcanic vent, also pertaining to rock texture of explosive origin It is not synonymous with the adjective "volcanic"
Pertaining to clastic (broken and fragmented) rock material formed by volcanic explosion or aerial expulsion from a volcanic vent
Pertaining to the clastic rock material formed by volcanic explosion or aerial expulsion from a volcanic vent; also, pertaining to rock texture of explosive origin It is not synonymous with the adjective "volcanic"
An igneous rock texture produced from consolidation of fragmented volcanic material ejected during a violent eruption Also used to describe ash, bombs and other material forcefully ejected during a volcanic eruption (=tephra) more details button
A flow of volcanic ash, dust, rocks and debris that cascades down the slope of a volcano during an eruption. Pyroclastic flows are very dangerous, reaching speeds greater than 60 miles per hour and temperatures in excess of 800 degrees Fahrenheit
An extremely hot mixture of gas, ash and pumice fragments, that travels down the flanks of a volcano or along the surface of the ground at speeds of 50 to 100 miles per hour The temperature within a pyroclastic flow may be greater than 500° C, sufficient to burn and carbonize wood Once deposited, the ash, pumice, and rock fragments may deform (flatten) and weld together because of the intense heat and the weight of the overlying material
A rapid, extremely hot, downward stream of pyroclastics, air, gases, and ash ejected from an erupting volcano A pyroclastic flow may be as hot as 800ºC or more and may move at speeds exceeding 150 kilometers per hour
A violent mixture of superheated volcanic ash and gas that can escape from a volcanic vent and, because it is heavier than air, travel down the flank of a volcano incinerating everything in its path
A rapid, hot, downward stream of rock fragments, air, gases, and ejecta from an erupting volcano They may be up to 800 degrees C and flow over 150 km/hr
Lateral flowage of a turbulent mixture of hot gases and unsorted pyroclastic material (volcanic fragments, crystals, ash, pumice, and glass shards) that can move at high speed (50 to 100 miles an hour ) The term also can refer to the deposit so formed
pyroclastic
Hyphenation
py·ro·clas·tic
Pronunciation
Etymology
() Derived from Ancient Greek πῦρ (pur, “fire”), and κλαστός (klastos, “broken”).