Tephra

Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism.

Tephra Media

Volcanic tephra at Brown Bluff, Antarctica (2016)
Tephra horizons in south-central Iceland: The thick and light-coloured layer at the centre of the photo is rhyolitic tephra from Hekla.
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
Satellite image of Chaitén volcano lava dome, Chile: The circular dome is brown and is surrounded by an ash covered landscape.

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