They are very hard so they could used for road building materials.
igneous rocks
Rhyolititcen rocks.
Igneous rocks are formed by the solidification of molten materials.
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
Yes. Volcanic rocks are extrusive igneous rocks.
Igneous rocks
No, igneous rocks are harder than sedimentary rocks on average.
extrusive igneous rocks =/
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
Yes. More exactly, intrusive igneous rocks.
yes, the orange rocks on mars are called igneous rocks!
Igneous Rocks - Rocks formed by crystallization from a melt (magma)