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