pyroclastic-flow deposit

pyroclastic-flow deposit

[‚pī·rə‚klas·tik ′flō dī‚päz·ət]
(petrology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Most amusing is the characterization of "Pyrodastic flow deposit adobe." Here, "adobe" is a Philippine colloquialism for pyroclastic-flow deposits, misapplied by the Spaniards from their experience in the Americas, where "adobe" was bricks of sun-dried clay mixed with grass.