USGS - science for a changing world

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. 43b. Structures formed by bedforms with along-crest- migrating, out-of-phase sinuosities.  Fig. 43a (A) Rate of along-crest migration of sinuosities is equal to the rate of lateral migration of the main bedform.  Fig. 43b (B) Rate of along-crest migration of sinuosities is approximately four times the rate of lateral migration of the main bedform.

RECOGNITION: In some vertical sections, these structures are relatively similar to structures produced by bedforms with in- phase crestlines (FIG. 42), but the two kinds of structures are distinguishable in horizontal sections.

ORIGIN: These types of structures require conditions that produce oblique bedforms with sinuous out-of-phase crestlines; specific fluid dynamic requirements are unknown.

 

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/seds/bedforms/dip_pages/dip43b.html
Page Contact Information: PCMSC Web Team
Page Last Modified: 21 March 2012 (lzt)