scoria

The type of volcanic rock with common vesicles is called scoria.

From Textbooks ● Jan. 1, 2017

Lank shadows and stocky, the fluttering shadows of dresses, the ridiculous elongated shadows of trousered legs, darted and danced last week all over the reddish scoria of the Roland Garros Stadium courts near Paris.

From Time Magazine Archive

Even the scoria, or slag from the furnaces, has been found to be good for something, and now it is made into a coarse sort of brick that for certain rough uses is of value.

From Diggers in the Earth by Eva March Tappan

It stands, a little to the right of the trail, on a rise of scoria and burned earth, from which it juts up in rugged relief to the height of twenty or thirty feet.

From The Land of Thor by J. Ross (John Ross) Browne

Here, though, he had a check, by the clothes of the infant catching in the rough scoria, when—foxlike—he backed out, turned, and then began to back in.

From A Double Knot by George Manville Fenn

His passions are scoriae, his imagination a holocaust.

From Time Magazine Archive

How and why did they shape their scoriae colossi?

From Time Magazine Archive

“But, if I may joodge from zee stones ant scoriae around,” said the professor, “zee volcano is not always so peaceful as it is joost now.”

From Blown to Bits The Lonely Man of Rakata, the Malay Archipelago by R. M. (Robert Michael) Ballantyne

In the first imperfect attempts the air was heated to little more than 80 degrees Fahrenheit, yet the results were satisfactory, and the scoriae from the furnace evidently contained less iron.

From Industrial Biography, Iron Workers and Tool Makers by Samuel Smiles

When he came to himself after the disappearance of Kate, his heart was a wasted field of volcanic action, with ashes and scoriae of infernal blackness on the surface, but the wholesome soil beneath.

From The Manxman A Novel - 1895 by Sir Hall Caine