The difference is a matter of size: ripples are small ridges of sand with a height (amplitude) typically less than 4 cm and wave lengths (crest to crest) less than 60 cm, while dunes have the same ...

The ripples on these dunes change over time due ... Namib Dune is between 13 to 17 feet tall and is just one of many sand dunes located in the Bagnold Dunes field situated along the northwestern ...

Martin County demolished the Sand Dune Cafe following fire New Year's Day. A new cafe is expected to be built in its place. The new cafe is expected to cost about $4 million. JENSEN BEACH — Sand ...

Mr. Cornish showed photographs of ripple-marks mimicking organic forms ... leaving the coarser materials arranged in ridge and furrow. Sand-dunes were built up by the wind on similar principles.

Imagine standing in the heart of a sun-scorched desert. The wind hushes, the world holds its breath, and suddenly, a deep, thunderous boom rolls across the sand—so startling and powerful, it seems as ...