extrusive igneous rock
Extrusive igneous rock.
igneous
All volcanoes produce igneous rocks.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
Volcanoes produce extrusive igneous rock.
A couple of them are obsidian and pumice.THEY ARE CALLED EXTRUSIVE IGNEOUS ROCKS...........THEY ARE SO CALLED BECAUSE THEY ARE FORMED FROM THE LAVATHAT HAS BEEN COOLED........
Any kind of volcano can form after the eruption. If it doesn't erupt and never has then it isn't a volcano.
intrusive igneous rock
igneous
sedimentary
Igneous rock forms from the lava of an erupting volcano. This rock is created when molten rock cools and solidifies, either on the surface (extrusive igneous rock) or beneath the Earth's surface (intrusive igneous rock). Examples of igneous rocks include basalt, rhyolite, and granite.
Molten.