Metamorphic rocks are broadly classified as foliated or non-foliated. Non-foliated metamorphic rocks do not have aligned mineral crystals. Non-foliated rocks form when pressure is uniform, or near the surface where pressure is very low.
How to Classify Metamorphic Rocks?
Metamorphic rocks are a type of rock formed from the transformation of an existing rock type, due to changes in temperature and pressure. Metamorphic rocks have been around for millions of years, and they are formed in a range of environments, from deep within the Earth’s crust, to shallow parts of the Earth’s surface. The classification of metamorphic rocks is based on the characteristics of the rocks, such as their composition, texture, and structure. In this article, we will explore how to classify metamorphic rocks.
To classify metamorphic rocks, it is important to understand the different types of metamorphic rocks, as well as the processes that form them. There are two main types of metamorphic rocks – foliated and non-foliated. Foliated metamorphic rocks have a layered structure, and their composition and texture has been altered by pressure and heat. Non-foliated metamorphic rocks, on the other hand, have a random structure, and their composition and texture have been altered by heat, but not by pressure.
Foliated metamorphic rocks can be further divided into two sub-categories: schists and gneisses. Sch