volcanic ash

American  

noun

Geology.

1. ash.

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Etymology

Origin of volcanic ash

First recorded in 1790–1800

Example Sentences

One especially noticeable blue-black patch in the rougher section of the valley is believed to be volcanic ash that was later redistributed by Martian winds, as seen in the accompanying 3D perspective views.

From Science Daily • May 15, 2026

"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

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

From Science Daily • Mar. 10, 2026

In addition there have been advances in computer modelling to improve the physics and processes involved in how different shapes and sizes of volcanic ash behave in the atmosphere.

From BBC • Apr. 15, 2025

Alex tried to decide which was better: dead body ash or volcanic ash.

From "The Dead and the Gone" by Susan Beth Pfeffer