Extrusive-formed on surface
Intrusive-formed underground
other kinds of rocks are sedimentary rock or igneous rock
Sedimentary, Igneous and Metamorphic.
Two types: Extrusive igneous rock and Intrusive igneous rock.
Igneous,sedimentry and metamorphic
Igneous rock is found in volcanoes.
Igneous rock can be found.
organic
There are three kinds of rock in the world: igneous, metamorphic and sedimentary.
It is an example of extrusive igneous rock.
There are three types of Rocks, Igneous, Metamorphic, and Sedimentary.
The six major types of igneous rock are as follows: Intrusive igneous rocks: Granite, Diorite, and Gabbro Extrusive igneous rocks: Rhyolite, Andesite, Basalt
Surtsey Island is made up of Scoria rock in the igneous rock.