GEOLOGY

Detailed explanation-1: -Especially among igneous rocks where the term ‘monomineralic’ is most often used. Examples of monomineralic igneous rocks are dunite (more than 90% olivine ) and anorthosite (more than 90% plagioclase feldspar).

Detailed explanation-2: -Sillimanite is more likely to be found in a metamorphic rock because it forms under high temperatures and pressures.

Detailed explanation-3: -Halite more commonly known as Rock salt is a mineral formed from sodium chloride. It’s chemical formula is NaCl and this also includes other variations of salt such as common salt and table salt. Rock salt tends to be the industrial name used for Halite.

Detailed explanation-4: -Monomineralic rocks are quartz sand, pure gypsum and magnesite, and the polymineralic ones are granite, basalt and porphyries. Natural rock materials are widely used for building purposes owing to their universal occurrence and physical and mechanical properties.