Question

What is the difference between cross- bedding and ripple marks?​

Answer 1

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Example of a graded bed. Largest grains occur at the base, and the grain size gradually decreases. RIPPLE MARKS are produced by flowing water or wave action, analogous to cross-bedding (see above), only on a smaller scale (individual layers are at most a few cm thick). Ancient ripples on a sandstone surface.

Answer 2

Answer:

The inclination of the cross-beds indicates the transport direction and the current flow from left to right while Ripple Marks Currents were flowing from right to left.