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Sedimentary Rock. Chapter 4 Section 3. Sedimentary Rock. Forms when wind or water deposit sediment Sediment – small pieces of material that come from rock or living material. Processes. Erosion – running water, wind or ice carry away fragments of weathered rock
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Sedimentary Rock Chapter 4 Section 3
Sedimentary Rock • Forms when wind or water deposit sediment • Sediment – small pieces of material that come from rock or living material
Processes • Erosion – running water, wind or ice carry away fragments of weathered rock • Deposition – wind, water and ice slows and sediment settles out in layers • Compaction – sediment is pressed together • Cementation – dissolved minerals crystallize and glue particles of sediment together
Types of Sedimentary Rock • Clastic rock – rock formed when fragments are squeezed together Rock Fragments can range in size
Examples of Clastic Sedimentary Rock Sandstone – sand from beaches or sand dunes Shale – clay particles Breccia - Rock fragments with sharp edges Conglomerate – rounded fragments of rock
Types of Sedimentary Rock • Organic Rocks –formed from once living things • Examples Coal – formed from plants that died millions of years ago Limestone –formed from ocean creatures
Types of Sedimentary Rock • Chemical Rocks – when minerals that are dissolved in solution crystallize Examples: Limestone – from dissolved calcite Rock Salt – from dissolved halite
Uses of Sedimentary Rock • Tools • Building materials