Eruptive

a.	1.	Breaking out or bursting forth. The sudden glance Appears far south eruptive through the cloud. - Thomson.
	2.	(Med.) Attended with eruption or efflorescence, or producing it; as, an eruptive fever.
	3.	(Geol.) Produced by eruption; as, eruptive rocks, such as the igneous or volcanic.
n.	1.	(Geol.) An eruptive rock.

Adj.	1.	eruptive - igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt; "volcanic rock includes the volcanic glass obsidian" Synonyms: volcanic
	2.	eruptive - of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro Synonyms: irruptive, plutonic
	3.	eruptive - erupting or tending to erupt; "a geyser is an intermittently eruptive hot spring"

agitable, bursting, detonating, edgy, emotional, emotionally unstable, excitable, explodable, explosible, explosive, fulminating, high-mettled, high-spirited, high-strung, highly emotional, inflammable, irascible, irritable, mettlesome, nervous, perturbable, prickly, sensitive, skittish, startlish, touchy, volcanic