Wiktionary
lavascape
n. A landscape created by a lava flow or flows.
Usage examples of "lavascape".
On the opposite side of the highlands from where Kyoki's castle stood, sweeping northeast off Asama-yama's skirt, was Onio-shidashi, a black, blasted lavascape aptly named after the monstrous outpouring of the earth's depths in 1783.