tephra

Etymology
From the.

Noun

 * 1)  The solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

Derived terms

 * cryptotephra

Translations

 * French:
 * German: pyroklastische Ablagerung, pyroklastisches Sediment, Pyroklastika
 * Icelandic:
 * Russian: