Here is a list of seven important metamorphic rocks: 1. Slate 2. Schist 3. Gneiss 4. Quartzite 5. Marble 6. Phyllite 7. Hornfels. 1. Slate: Slate is an extremely fine-grained metamorphic rock characterized by a slaty cleavage by virtue of which it can be readily split into thin sheets having parallel smooth surfaces. The slaty cleavage is due to parallel [...]
Metamorphic rocks are classified on the basis of foliation into the following types: 1. Foliated Metamorphic Rocks 2. Non-Foliated Metamorphic Rocks. 1. Foliated Metamorphic Rocks: i. Slate: Slates are formed due to dynamic regional metamorphism of shales and other argillaceous rocks. Slates are characterized by the 'presence of numerous closely- spaced parallel planes of splitting or cleavage' but the splitting [...]
After reading this article you will learn about:- 1. Classification of Metamorphic Rocks 2. Structures in Metamorphic Rocks 3. Engineering Uses. Classification of Metamorphic Rocks: 1. Metamorphic rocks may be classified on the basis of foliation into two types. They are: (a) Foliated rocks: This group includes the rock that can split into thin sheets. Examples: Slate, Schist, Gneiss, etc. [...]