Why are the crystals of intrusive igneous rock typically larger than those of extrusive igenous rock?

a. because the magma cools very quickly

b. because the magma cools much slower

c. because of a higher water content in the magma

d. because the temperatures of the magma are much lower

Question

Johnathon Hunter

Geography

17 January, 23:20

Why are the crystals of intrusive igneous rock typically larger than those of extrusive igenous rock?

a. because the magma cools very quickly

b. because the magma cools much slower

c. because of a higher water content in the magma

d. because the temperatures of the magma are much lower

+2

Answers (2)

Know the Answer?

Gordon Flowers · Answer 1

Intrusive rocks come from magma. They cool slowly deep in Earth's crust. When magma cools underground, the crust acts like a blanket, insulating it, keeping it warm longer. Because the magma cools slowly, crystals of different minerals have time to grow.

Eleanor Griffin · Answer 2

The correct answer is (B. because the magma cools much slower

Why are the crystals of intrusive igneous rock typically larger than those of extrusive igenous rock?a. because the magma cools very quicklyb. because the magma cools much slowerc. because of a higher water content in the magmad. because the temperatures of the magma are much lower

Why are the crystals of intrusive igneous rock typically larger than those of extrusive igenous rock?

a. because the magma cools very quickly

b. because the magma cools much slower

c. because of a higher water content in the magma

d. because the temperatures of the magma are much lower