How can you tell the difference between an evaporate and a clastic sedimentary rock?

Answer:

To put it simply, 'clastic' means that the sedimentary rock is deposited from 'recycled' previous rock, 'organic' means that it is sedimentary rock derived from some form of life - plants or animals, and 'chemical' means that it has precipitated out of water through evaporation or through chemical interaction of two different bodies of water.
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