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 ...
Kathlene Persoff: “Strong Atlantic winds at Palmetto Dunes Beach on Hilton Head Island, South Carolina, created graceful ripples in the sands.” Shauna Dalziel: “The sky, the sea, the sand ...
Researchers have discovered two sets of ancient wave ripples on Mars, signatures of long-dried bodies of water preserved in ...
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