Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidifies and can form extrusive igneous rocks or intrusive igneous ...

Perseverance's drives over the last few weeks have doubled back several times. Why such an unconventional route? Team ...

This process can occur either below the Earth’s surface, forming intrusive or plutonic igneous rocks like granite, or at the surface following a volcanic eruption, producing extrusive or ...