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Sedimentary rocks
 

Sedimentary rocks

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    Sedimentary rocks Sedimentary rocks Presentation Transcript

    • 1. Formation a. Weathering b. Erosion c. Deposition d. Compaction e. Cementation *LITHIFICATION=process to make sedimentary rocks*
    • a. Weathering – the breakdown of material at the Earth’s surface.g i. The weathered material is called SEDIMENT.
    • Did you Know? ¾ of rocks on the Earth’s surface are sedimentary?! ?!
    • ii. Sediment size varies – mud, sand, gravel
    • b. Erosion – movement of sediment from on place to another by WIND, WATER, or ICE.
    • c. Deposition – dropping off the sediment in a new location.
    • Now it’s time to put them together! d. Compaction (Squeezing) e. Cementation (Gluing)
    • A. Clastic Made from sediment such as clay, gravel, or sand
    • i. Sand becomes sandstone
    • Did you Know? The white house is built of sandston e!
    • ii. Clay and mud become shale
    • iii. Gravel becomes conglomerate.
    • B. Organic sedimentary rock is formed from previously living things. i. Limestone – ocean life ii. Coal – plant life on land
    • 4. Chemical sedimentary rock is formed from a chemical reaction such as water evaporating and leaving rocks behind.
    • i. Mineral crystals left behind in Death Valley after the water evaporates ii. Playa Lake in California – in the process of evaporating and leaving chemical rock behind
    • Mammoth Cave in Kentucky!!!!!