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What is Crust? Describe its main features.

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The topmost layer of Earth is called the Crust. 

Characteristics:

1. It is the topmost part of the earth’s surface. 

2. Its thickness is found to vary under the continents and the oceans which is 30 km and 5 – 10 km respectively. According to the height in mountainous areas, its depth varies. 

3. This layer is made of heavy rocks. Its density is 3 grams per cubic centimeter. 

4. Ba-salts terraces of crust are built below the oceans. 

5. It has been divided into two parts – inner crust and outer crust.

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