Question 1

The rock which is composed of entirely of crystals is known as

Accepted Answer

Holocrystalline rocks are composed entirely of crystals, indicating that the rock has cooled slowly enough for crystals to form throughout.

Question 2

The rock which completely consist of glass is known as

Accepted Answer

Holohyaline rocks are those that are entirely made up of glass, with no crystalline structure.

Question 3

The rock which consists of partly of crystals and partly of glass is known as

Accepted Answer

Mesocrystalline rocks are characterized by a texture that is partly crystalline and partly glassy. This texture indicates a mixed cooling history where some minerals had time to crystallize, while others were quenched into glass.

Quiz 3: Geology and Mineralogy

The rock which is composed of entirely of crystals is known as

The rock which completely consist of glass is known as

The rock which consists of partly of crystals and partly of glass is known as