Clastic Sedimentary Roc k

Clastic Sedimentary Roc k - ToniaPieper Geology245...

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 Clastic Sedimentary Roc k Tonia Pieper Axia College at University of Phoenix Geology 245 Physical Geology
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The origin of sedimentary rocks is the weathering, erosion and the chemical breakdown of other  rocks.  These other rocks could be igneous, metamorphic or even other sedimentary rocks.  They accumulate grain by grain and molecule by molecule, on the floors of oceans; these layers  of material represent the beginning to sedimentary rocks.  Although sedimentary rocks make up  some of the Earth’s lithosphere, they are concentrated near and at the surface, where they  actually represent most of the rocks exposed at the surface.  Layers of sedimentary rock are  formed by slow deposition from winds and normal rains and also from rapid deposition from  catastrophic processes such as large rains, tsunamis, earthquakes and floods. The physical make up of these rocks provides many clues as to where and how the rocks may  have formed.  Some sedimentary rocks also have important commercial value as source of  coal, various types of petroleum, ground water, building materials, and economically valuable  mineral deposits. They are formed of materials that have been derived by the processes of  weathering and erosion from other, pre-existing rocks at the Earth’s surface.  Sedimentary rocks 
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Clastic Sedimentary Roc k - ToniaPieper Geology245...

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