: a hard rock formed by solidification of chiefly fine deposits of volcanic ash
Examples of ignimbrite in a Sentence
Recent Examples on the WebIts largest eruption put down a 200m thick layer of ignimbrite—a frozen foam of volcanic ash, rock, and gas—over much of the central north island.
Chris Lee, Ars Technica, 16 Oct. 2017
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ignimbrite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.