Pyroclastic flow generation, ejection of incandescent material, and tephra fall affected the glacier.

UNESCO: Dublin Core

It claims its massive investment in grassroots outreach will shield it against the expected pyroclastic flow of negative advertising.

ECONOMIST: Lexington

At first glance, it might seem obvious that it was through the action of flowing water (fluvial), but the Curiosity team needs to rule out the possibility that these rocks were deposited by the wind (aeolian) or by some kind of surge, such as the fast-moving clouds of gas and rock that will often plummet down the sides of particular types of volcano (a pyroclastic surge).

BBC: Curiosity Mars rover to investigate classic rock type