India : Location, Geologial Structure and Physiography-Il — Social Science STD 9 — Question

Stratified (Sedimentary) Rocks:

1. After disintegration, sand, mud and pebbles get laid down in layers. Over time, these layers are squashed under more and more layers.
2. Over a period of time igneous rocks get disintegrated due to the collective effect of water and other forces. These rocks get laid as layers.
3. Over time, these layers are squashed under more and more layers and water.
4. The upper layered rocks exert pressure on the layers of old layers of rocks below them. Eventually, rocks are formed with different layers.
5. These rocks are called ‘Sedimentary Rocks’ or ‘Stratified Rocks’.
6. Examples of stratified rocks are gypsum, limestone and coal.
7. Coal and gypsum are obtained from Bihar and Jharkhand.

Types of stratified rocks:
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