a Obsidion rock
a Obsidion rock
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
extrusive igneous rock.
extrusive because it forms on or near earths surface
Extrusive igneous rock.
extrusive- when melted rock material coools on earths surface instursive-when the melt cools below earths surface
Extrusive rocks are formed outside of earths surface. Intrusive rocks are formed inside earths surface.
Such rock is extrusive igneous rock.
Extrusive (volcanic) and exposed plutonic igneous rock.
Igneous rocks formed at the Earth's surface are called extrusive igneous rocks. They form when magma cools and solidifies quickly on the Earth's surface, resulting in fine-grained or glassy textures. Examples include basalt and rhyolite.
Igneous rock that forms below the Earth's surface is intrusive.
extrusive igneous rock