Question

Which statement best describes the formation of an intrusive igneous rock? Here are the choices: 

A.Magma solidifies slowly, resulting in a coarse-grained texture. 
B.Magma solidifies slowly, resulting in a fine-grained texture. 
C.Magma solidifies rapidly, resulting in a glassy texture. 
D.Magma solidifies rapidly, resulting in a clastic texture

Answer 1

A.Magma solidifies slowly, resulting in a coarse-grained texture.

Intrusive igneous rocks are created underground when magma, trapped in small pockets cools down.

Answer 2

The correct answer is - A. Magma solidifies slowly, resulting in a coarse-grained texture.

The intrusive igneous rocks are forming when the magma solidifies very slowly, deep underground, under higher temperatures and pressures. All these conditions contribute to the coarse-grained structure to form on these types of rocks and have it as a trademark. These rocks are very hard rocks, with big density, their colors vary a lot but are more on the dark side usually. Some of them are diorite, granite, pegmatite...