Types of Sedimentary Rocks :
1. Organic Sedimentary Rocks:
These rocks are formed as a result of the decomposition of dead plants and animals.
It contains fossils. Chalk, Talc, Dolomite and Limestone rocks are of this category.
2. Mechanical Sedimentary Rocks:
- These rocks are formed from the disintegration of igneous and metamorphic rocks.
- The natural agents erode and transport these rocks and deposit them at some places. After a long period of time, they cemented to form rocks.
- Sandstone, Shale and Clay are the examples of rocks of this type.
3. Chemical Sedimentary rocks
- These are formed by precipitating of minerals from water. It is formed usually through evaporation of chemical rich solutions.
- These rocks are also called as evaporates.
- Rock Salt is an example of this kind.
