directional sedimentary structure

geology

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In sedimentary rock: Sedimentary structures
…structures are referred to as directional sedimentary structures because they can be used to infer the ancient paleocurrent pattern or dispersal system by which a sedimentary rock unit was deposited. Other sedimentary structures are stratigraphic “top and bottom” indicators. For example, the progressive upward decrease in clastic grain size diameters,…
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