SEDIMENTARY - rocks formed at the bottom of seas or rivers, GRANITE - an igneous rock with large crystals, MAGMA - Liquid rock under the surface, SANDSTONE - a sedimentary rock, METAMORPHIC - a rock formed by changing other rocks with heat or pressure, MARBLE - a metamorphic rock that once was limestone, FOSSIL - an animal or plant solidified in rock, GEOLOGY - the study of rocks, EROSION - the process of rocks being broken up, IGNEOUS - rocks formed by cooling magma,

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