because if we don't have volcanoes we all wouldn't have precious gems
Because the lava from volcanoes form igneous rocks
lol no
volcanoes are a rock formation that's what the have to do with rocks and when the hot magma (lava) gets hit with cold water the magma (lava) starts to harden there fore creating a lava rock
Without igneous rocks, we would not have beautiful granite countertops.
No. Plutonic rocks are igneous rocks that hardened underground. Rocks that form on volcanoes are volcanic rocks.
A geologist of course, they study rocks, and land formations. and as you must know volcanos are a land formation
Igneous Rocks.
http://en.wikipedia.org/wiki/Volcano volcanoes can be composed of a variety of igneous rocks.
igneous rocks form within earths surface
igneous rocks,sedimentary rocks, and metamorphic rocks.
Rocks formed in volcanoes from magma.
Volcanoes form igneous rock.