2 Words to use with fissure

"Your vein is a fissure vein all right enough, and you've got a good wide lead.

IZALIO, a volcano in the republic of San Salvador, which first announced its existence by a fissure opening in 1798 on the plain that now surrounds it, from which there vomited lava and cinders, accompanied with earthquake.

2 Words to use with  fissure