Topic Content:
- Igneous Rocks
- Plutonic (Intrusive) Igneous Rocks
- Volcanic (Extrusive) Igneous Rocks
- Differences between Plutonic Rocks and Volcanic Rocks
Igneous Rocks are formed when molten magma or lava cools and solidifies.
Igneous rocks contain crystals and are crystalline in structure, they do not contain any fossils. They are usually hard and difficult to penetrate once they are formed and do not have layers, they are non-stratified. Igneous rocks are either basic or acidic. Igneous Rocks also vary in size and colour. They are also known as primary or crystalline rocks.
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