name three types of sedimentary rocks according to their place of formation
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Clastic,Chemical and organic
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Clastic sedimentary rocks : They are formed from the build up of clastic : small piece of rocks deposited as a result of mechanical weathering then lithified by compaction and cementation.
Ex: sandstone
Chemical sedimentary rocks : They are formed when the water components evaporate leaving dissolved material behind. Sedimentary rocks of these kind are very common in arid lands such as the deposits of salt and gypsum.
Ex : salt rock
Organic sedimentary rocks : They are formed by the accumulation of any plant or animal debris have calcium minerals in them that pile on sea floor over time to form organic sedimentary rocks.
Ex : coal
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