Classification of Sedimentary Rocks 11A(2) 1st qt 22/23

​Sedimentary rocks are classified based on their texture and composition. 

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Detrital sediment has a clastic (broken) texture. 

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Chemical and organic sediments have a non-clastic texture, and are classified based solely on their composition.

​Clastic rocks are named for their grain size and shape.

​Coarse-grained (>2 mm) rocks with rounded grains are called conglomerate.

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If the coarse-grains are angular, the rocks are called breccia.

​https://sites.radford.edu/~jtso/GeologyofVirginia/Rocks/GeologyOfVARocks2-4b.html

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