Sedimentary rocks
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Transcript of Sedimentary rocks
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Weathering Erosion Deposition Compaction Cementation
*LITHIFICATION*
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Weathering – the breakdown of material at the Earth’s surface.g
The weathered material is calledSEDIMENT.
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Sediment size varies – mud, sand, gravel
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Erosion – movement of sediment from on place to another by WIND, WATER, or ICE.
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Deposition – dropping off the sediment in a new location.
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Sediment gets put together into sedimentary rock through
Compaction (Squeezing)
Cementation (Gluing)
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Sand becomes sandstone
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Clay and mud become shale
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Gravel becomes conglomerate.
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Organic sedimentary rock is formed from previously living things.
Limestone – ocean life
Coal – plant life on land
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Chemical sedimentary rock is formed from water evaporating and leaving rocks behind.
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Mineral crystals left behind in Death Valley after the water evaporates
Playa Lake in California – in the process of evaporating and leaving chemical rock behind
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Sedimentary rocks are used in many ways – •Buildings•Making cement•Burning for fuel