The rocks can be classified into two main varieties, namely, Igneous rocks and Sedimentary rocks. But when these rocks are subjected to prolonged fluctuations of temperature and pressure, they are transformed to a new variety which is termed as Metamorphic rocks. 1. Igneous Rocks: A change of temperature caused the formation of igneous rocks. It […]
Classification of Rocks | Petrology | Geology
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Unconformity in Rocks: Types and Uses | Structural Geology
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After reading this article you will learn about:- 1. Types of Unconformity 2. Field Evidences of Unconformities 3. Uses. Types of Unconformity: There are mainly three types of unconformity. They are: 1. Disconformity, 2. Angular unconformity, and 3. Nonconformity. 1. Disconformity: The rock beds on opposite sides of a disconformity are parallel as shown in […]
Metamorphic Rocks: Classification, Structures and Uses | Petrology
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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. […]