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Chemistry
Dalton Bryan
1 August, 18:06
Rocks are grouped according to
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Valery Mccullough
1 August, 20:37
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Rocks are grouped according to their formation into three major groups - igneous, sedimentary, and metamorphic rocks
Explanation:
Based on their formation, rocks are further sub-grouped as: Igneous - Intrusive or extrusive Sedimentary - Clastic, chemical, or biologic rocks Metamorphic - Foliated and non-foliated Rocks are also grouped based on their properties like size, shape, texture, chemical composition, permeability, mineralogy, etc. Based on properties rocks are sub-grouped as: Igneous rocks - coarse or fine-grained; glassy or obsidian; felsic or mafic. Sedimentary rocks - conglomerate, sandstone, breccia, shale, siltstone, chalk, crystalline or fossiliferous limestone, gypsum, rock salt etc. Metamorphic rocks - Gneiss, hornfels, mylonites, cataclasties, marble, etc.
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