ash flow

American  

noun

Geology.

1. an avalanche of volcanic ash.

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Example Sentences

“If we have a really hot fire that cooks the vegetation that holds the soil together, we could have increased sedimentation, debris and ash flow,” Johnson said.

From Los Angeles Times

“So you worry about water supply being interfered with in some way, like if there was a big ash flow into one of the reservoirs, and that could cause problems,” Wara said.

From Scientific American

Meanwhile, Nemo urged those remaining on the island to "be careful on the roads, which have become treacherous as a result of the ash flow".

From BBC

Nemo is urging residents to "be careful on the roads, which have become treacherous as a result of the ash flow".

From BBC

“The efforts are a little stymied because of the ash flow,” she said.

From Washington Post