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