Presentation on theme: "Sedimentary Rocks Cornell Notes pg. 133. How do Sedimentary Rocks form? Small rocks, sand, and other sediment are deposited in thick layers. Over time,"— Presentation transcript:
Sedimentary Rocks Cornell Notes pg. 133
How do Sedimentary Rocks form? Small rocks, sand, and other sediment are deposited in thick layers. Over time, sediment is compacted and cemented together to form rock.
Where does the sediment come from? Other rocks that are weathered (broken down) –Can be from igneous, metamorphic, or even other sedimentary rocks!
What is compaction? What is cementation? Small rocks and sand are compressed (pressed together) Minerals dissolved in water act as a glue to bind sediment together.
What is strata? Most noticeable feature of sedimentary rocks- rocks layers!
What is Clastic Sedimentary Rock? Fragments of rock and sand are cemented together with dissolved minerals. Can be coarse or fine grained.
What is Chemical Sedimentary Rock? Rainwater dissolves minerals from rocks Minerals eventually crystallize to form chemical sedimentary rocks. –Halite: rock salt
What is Organic Sedimentary Rock? Forms from remains of plants and animals. –Coal: ancient swamps –Limestone: hard shells of living things