A couple of them are obsidian and pumice.
THEY ARE CALLED EXTRUSIVE IGNEOUS ROCKS...........
THEY ARE SO CALLED BECAUSE THEY ARE FORMED FROM THE LAVA
THAT HAS BEEN COOLED........
Extrusive igneous rock.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
Igneous Rocks
Volcanoes produce extrusive igneous rock.
Such rock is extrusive igneous rock.
Extrusive igneous rock.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
igneous
All volcanoes produce igneous rocks.
extrusive igneous rock
Igneous Rocks
Either a type of lava called AA (ah-ah) comes out of the volcano of a type of lava called pahoho comes out.An Extrusive Igneous Rock.
Volcanoes produce extrusive igneous rock.
a shield volcano
igneous rock
IT IS A Sheild volcano
Such rock is extrusive igneous rock.