Presentation on theme: "Sedimentary Rock. Sedimentary rock is created when existing rock breaks down into sediments, and then the sediments are recombined by compaction and cementation."— Presentation transcript:
Erosion Erosion is the removal of rock and its movement by water, wind, ice, or gravity.
Deposition When water, wind, ice or gravity loses energy the sediments are released and deposited in a new area. Sediments are deposited according to size, with larger sediments being released first
Sedimentary Rock Compaction and cementation are the two processes that change sediment into sedimentary rock.
Compaction Compaction is a process that squeezes, or compacts sediments
Cementation Cementation takes place when dissolved minerals are deposited in tiny spaces among the sediments. These minerals hold the sedimentary rocks together
Classification of Sedimentary Rock Sedimentary rocks like igneous rock can be classified into two groups based on how the form: Clastic Sedimentary Rock Chemical Sedimentary Rock
Clastic Sedimentary Rock Clastic Sedimentary Rocks are created when weathered bits of rocks or minerals are cemented together
Chemical and Biochemical Sedimentary Rocks Chemical Sedimentary rocks are created when dissolved minerals precipitate from water solutions Biochemical Sedimentary rocks are created when living or once living materials are cemented together
Features of Sedimentary Rock Sedimentary rock can have unique features that can help us interpret the history of the Earth. Some Features include: Ripples Mud Cracks Fossils