Question

What is it called when two or more minerals crystallize simultaneously in a limited space?

(a) Directive texture

(b) Intergrowth texture

(c) Interstitial texture

(d) Intergranular texture

The question was asked by my college director while I was bunking the class.

Origin of the question is Composition and Texture of Igneous Rocks topic in division The Study of Rocks of Engineering Geology

Answer 1

The correct option is (b) Intergrowth texture

Easiest explanation: During the formation of the igneous rocks, sometimes two or more minerals may crystallize out simultaneously in a limited space so that the resulting crystals are mixed up or intergrown. This type of mutual arrangement is expressed by the term intergrowth texture.