What is a rock? Understand its main types.
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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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a rock is an aggregate of one or more minerals. It is of three main types -:
1-igneous rock.
2-sedimentary rock.
3-metamorphic rock.
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