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Identifying rocks and minerals . The Rock Cycle. Igneous :Porphyry and obsidian. Sedimentary: Conglomerate. Breccia. Sandstone. Shale. Calcite. Halite and Gypsum. Coal. Limestone. Stratification. Graded Bedding. Ripple Marks. Mud Cracks. Concretions. Geode. Metamorphic: Slate.
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