ripple-drift cross-lamination A form of cross-stratification (sometimes called climbing-ripple cross-lamination) characterized by set boundaries which dip in the opposite direction to the foresets, giving the impression of one set climbing upwards over the underlying set. In some cases the ripple stoss slope (i.e. the gently dipping backslope) is preserved. Ripple-drift cross-lamination forms when there is a rapid rate of net deposition, with the angle at which the sets climb over one another being a function of increasing rate of sedimentation.
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