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SEDIMENTARY ROCKS are classified by the types of sediments that make up the rock Sediments What are sediments? Def: Processes How sediments form into sedimentary rock: Write the steps in order w/descriptions Erosion (wash away) may include shells, bones, leaves, stems, etc Forces – Deposition (drop down) Compaction (smashed together) Cementation (glued together) Picture(s) Thick layers of sediment build up over time & weigh down the layers compacting the sediments. dissolved minerals seep into the spaces between particles & then harden Picture(s) Types Clastic Rock (Define each type: Write the steps in order w/descriptions Def: Picture Examples: Shale - forms from tiny particles of clay Sandstone - forms from sand on beaches, ocean floor, river beds, etc. Conglomerate - forms from rounded sediment. Breccia - forms from larger, sharp fragments of sediments. Def: Coal – forms from swamp plants buried in water for millions of years. Organic Rock Chemical Rock Uses Building Materials And Tools: Limestone – forms in the ocean from hard shells with calcite from seashells, coral, clams & oysters or skeletons that pile up on the ocean floor for millions of years slowly changing the sediment to limestone Def: lakes & underground caves. Rock Salt – forms from halite by evaporation What things have been made from sedimentary rocks? Flint – Sandstone – Limestone - Fossils Limestone – forms from calcite in dissolved seas,