what is a rock? classify rocks and also highlight the characteristics economic significance of each types of rocks
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A rock is a solid mass of geological materials....
Rocks are classified into three categories:-
1. Igneous rocks:- Igneous rocks form when molten rock (magma or lava) cools and solidifies.
2. Sedimentary rocks:- Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers.
3. Metamorphic rocks:- Metamorphic rocks result when existing rocks are changed by heat, pressure, or reactive fluids, such as hot, mineral-laden water.
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A rock is a solid mass of geological materials. Geological materials include individual mineral crystals, inorganic non-mineral solids like glass, pieces broken from other rocks, and even fossils. ... A rock can be composed of only one type of geological material or mineral, but many are composed of several types.
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