'Formed at the Earth's surface, basalt is the extrusive type of this "Big 3" type of rock'
igneous
EARTH: Formed at the Earths surface, basalt is the extrusive type of this Big 3 type of rock
Formed at the Earth's surface, basalt is the extrusive type of this "Big 3" type of rock
Formed at the Earth's surface, basalt is the extrusive type of this "Big 3" type of rock
EARTH
igneous
EARTH