eruptive
adj 1: 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"
[syn: {volcanic}]
2: igneous rock that has solidified beneath the earth's
surface; granite or diorite or gabbro [syn: {irruptive}, {plutonic}]
3: erupting or tending to erupt; "a geyser is an intermittently
eruptive hot spring"; "people fled from the erupting
volcano" [syn: {erupting(a)}]