pyroclastic density current (English, noun)
expansion: pyroclastic density current (plural pyroclastic density currents)
Senses:
glosses: a pyroclastic flow; a gas-rich, hot, dense, ground-hugging torrent of ash, lapilli, and volcanic blocks that results from the gravitational collapse of a volcanic eruption column, associated with explosive plinian and ultraplinian volcanic eruptions, and which produces a type of volcaniclastic deposit called an ash-flow tuff or an ignimbrite.
Forms:
form: pyroclastic density currents
tags: plural