volcanic ash

American  

noun

Geology.

1. ash.

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Etymology

Origin of volcanic ash

First recorded in 1790–1800

Example Sentences

See Examples For:

volcanic ash

"It is known that volcanoes emit methane during eruptions, but until now it was not known that volcanic ash is also capable of partially cleaning up this pollution," he adds.

From Science Daily ● May 10, 2026

Scientists were able to determine the age of the fossils because they were preserved between two distinct layers of volcanic ash inside the cave.

From Science Daily ● Mar. 26, 2026

Their position suggests they were later exposed to heat from lava or volcanic ash after they originally formed.

From Science Daily ● Mar. 10, 2026

Rolls-Royce was at the forefront of pioneering testing and for the first time was able to establish a level of volcanic ash that didn't seriously affect the jet engine over a given timeframe.

From BBC ● Apr. 15, 2025

A textbook example occurred after the eruption in 1980 of Mount St. Helens, in southern Washington State, which inundated more than two hundred square miles with magma, volcanic ash, and mud.

From "1491" by Charles C. Mann