extrusive

adjectives

of rock material; forced out while molten through cracks in the earth's surface

extrusive

is derived from

antonym

is similar to

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"

domain category

a science that deals with the history of the earth as recorded in rocks