Question

Plutonic (also called "intrusive") igneous rocks, because of their cooling rate, are be distinguished by having:

O more mica than quartz
O large holes produced by gas release
O relatively small crystals
O relatively large crystals

Answer 1

Answer: Plutonic (intrusive igneous rocks), because of their cooling rates, are to be distinguished having - relatively large crystals.

Explanation: Plutonic in minerology are rocks formed deep in the Earth's crust, rather than by volcanoes at the surface of the Earth. "Pluton" is a general term to describe an intrusive igneous body.

The most common rock types in plutons are granite, granodiorite, tonalite, monzonite, and quartz diorite.

They are believed to be formed from either one single magmatic event, or several incremental events.

Answer 2

Answer: D. relatively large crystals

Explanation: Intrusive or plutonic igneous rocks forms when magma cools and solidifies slowly below the Earth's crust, the large crystals that can be seen with the naked eye. Most intrusive rocks have large, well-formed crystals. Examples include granite and dunite.