There are many smaller craters near its summit, the surrounding rocks, consisting chiefly of lava and basalt, are covered with loose stones, scoria, and ashes.
"A Girl's Ride in Iceland"
Ethel Brilliana Alec-Tweedie
Instead of, as in the case of fire volcanoes, the ejected matters being smoke, flame, lava, scoria, pumice stone, and scalding mud.
"A Girl's Ride in Iceland"
Ethel Brilliana Alec-Tweedie
Captain William Guy, Patterson, and their five companions descended the ravine, which was half filled with the fallen masses of the hill-face, amid heaps of scoria and blocks of black granite.
"An Antarctic Mystery"
Jules Verne