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Pronunciation varies by accent · adjective
(volcanology) Mostly composed of rock fragments of volcanic origin or comminuted during an eruption..
The word "ash" is not a very good one to include all the mechanical accompaniments of a subaerial or subaqueous eruption, since ash seems to be restricted to a fine powder, the residuum of combustion. A word is wanting to express all such accompaniments, no matter what their size or condition may be, when they are accumulated in such mass as to form beds of "rock." We might call them perhaps "pyroclastic materials," ...
Within sixty seconds, the entire area was razed by pyroclastic material with a temperature of nearly two thousand degrees Fahrenheit.
The basic volcanics are altered andesites, porphyritic diabases and andesites, and various pyroclastics.
Use pyroclastic when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyroclastic means (volcanology) Mostly composed of rock fragments of volcanic origin or comminuted during an eruption..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
The word "ash" is not a very good one to include all the mechanical accompaniments of a subaerial or subaqueous eruption, since ash seems to be restricted to a fine powder, the residuum of combustion. A word is wanting to express all such accompaniments, no matter what their size or condition may be, when they are accumulated in such mass as to form beds of "rock." We might call them perhaps "pyroclastic materials," ...
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