Sedimentary: forms when sediments accumulate, compact, and cement together  , Deposited in layers , Contains sand, pebbles, and fossils , Sandstone , Limestone , Boulder size particles , Moved by deposition, erosion, wind, water, ice, and gravity , Broken down by weathering, chemical changes, and living things, Metamorphic: Formed by heat and pressure buried deep below Earth's surface, Layers or banded apperance, Crystals , Gneiss, Marble , Slate , Igneous: Formed when lava or magma harden, Found near volcanoes or fissures, Basalt, Obsidian , Granite , Fast and slow cooling , Large crystals, glassy, and many colors ,

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