Cross bedding and how to use it to infer way-up direction in stratigraphic sequences

Cross bedding as a primary sedimentary rock structure to infer the way-up (younging) direction in sedimentary rocks. In the example shown, a series of cross-beds are shown and can be used to infer the flow direction. Truncation of the cross-beds can be used to infer the way-up, which is then recorded using the younging symbol.

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