The real-life sand model develops its anticline through the same process, which results from mechanically different layers of granular media within the model. Anticlines in these pink-and-green models tend to show small faults or obvious stretching and thinning of layers along the crest of the anticline. The CDEM model also develops upward-steepening normal faults which rotate into reverse-sense motion as seen in the real-life sand models.