transverse dune

A transverse dune is a ridge of sand (rather than a simple curved mound) that develops in areas where sand is abundant and wind direction constant. The windward slope of such a dune is comparatively gentle. As Janice Emily Bowers writes in Dune Country, “The transverse dunes are low, usually no more than forty feet tall, but they make up for their lack of height in breadth and depth: some are up to eight hundred feet long and four hundred feet across.” Ranks of transverse dunes look like immense ripples lapping on a desert shore.

D. J. Waldie