Synonyms for eruptive

Adjective

1. eruptive, volcanic, extrusive (vs. intrusive)

usage: 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"

2. irruptive, eruptive, plutonic, intrusive (vs. extrusive)

usage: of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro

3. eruptive, active (vs. dormant) (vs. extinct)

usage: erupting or tending to erupt; "a geyser is an intermittently eruptive hot spring"