Tephra
Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism.[1]
Tephra Media
Volcanic tephra at Brown Bluff, Antarctica (2016)
A 2007 eruptive plume at Mount Etna produced volcanic ash, pumice, and lava bombs.
Rocks from the Bishop tuff, uncompressed with pumice on left; compressed with fiamme on right
Volcanic breccia in Jackson Hole
The Mount St. Helens National Volcanic Monument after the 1980 eruption