1. Ch4 Sec3 Sedimentary Rocks

2. Key Concepts • How do sedimentary rocks form? • What are the three major types of sedimentary rocks? • How are sedimentary rocks used?

3. Key Terms • Sediment • Erosion • Deposition • Compaction • Cementation • Clastic rock • Organic rock • Chemical rock

4. Ch4 Sec3 • From Sediment to Rock • Sediment: is small, solid pieces of material that come from rocks or living things • Most sedimentary rocks are formed through a series of processes: erosion, deposition, compaction, and cementation

5. Ch4 Sec3 • Erosion: running water, wind, or ice loosen and carry away fragments of rock • Deposition: is the process by which sediment settles our of the water or wind carrying it • Compaction: the process that presses sediments together • Cementation: is the process in which dissolved minerals crystallize and glue particles of sediment together

6. Ch4 Sec3 • Types of Sedimentary Rock • There are three major groups of sedimentary rocks • Clastic: is a sedimentary rock that forms when rock fragments are squeezed together • Organic rock: forms where the remains of plants and animals are deposited in thick layers • Chemical rock: when minerals that are dissolved in a solution crystallize

7. Ch4 Sec3 • Uses of Sedimentary Rocks • People have used sedimentary rocks throughout history for many different purposes including: building materials and tools