Question
Describe igneous rocks.
✓
Answer
Igneous Rocks:
Examples:
- The molten rock material is called magma.
- When it cools, it becomes solid.
- Rocks formed in this way are called igneous rocks.
- They are also called primary rocks because other rocks are formed out of these rocks.
- Intrusive Rocks and
- Extrusive Rocks
- Due to extreme heat in the interior of the earth, rocks are found in the form of molten material called magma.
- When magma comes out on the surface of the earth, it cools down and turns into solid rocks. Such rocks are termed as extrusive rocks.
- Basalt.
- Deccan Trap is built of basalt.
Examples:
- Granite.
- Garbo.
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