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Pacific Coastal & Marine Science Center

Bedform Sedimentology Site: “Bedforms and Cross-Bedding in Animation”

Cross-Bedding, Bedforms, and Paleocurrents

Dip plots, static images, and captions

View Animation

Dip plot; see caption below.
Static image of cross-section; see caption below.

FIG. 56.  Structure formed by straight-crested longitudinal bedforms with superimposed, sinuous, out-of-phase transverse bedforms.

RECOGNITION: In sections parallel to the main bedform crestlines, this structure looks like simple climbing-ripple structures, whereas in sections normal to the main bedform crestlines, the structure appears to have been deposited by vertically stacked bedforms.

ORIGIN: As with other longitudinal bedforms, formation of this structure requires the unusual situation where sediment is transported into a depositional area without migration of the bedforms in that area.

 

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