Which of the following is an example of igneous rock ?

Options

A. A Basalt
B. B Limestone
C. C Slate
D. D Graphite

Answer

A

Explanation

Basalt is a common extrusive igneous (volcanic) rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet or Moon. It is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume and where at least 65% of the feldspar is in the form of plagioclase.