Ripples in sand can be formed by wind or waves. The ripples I observed on the beach looked to be mostly formed by water, since they were being uncovered by the outgoing tide.

If you can’t get to the beach, you can catch some waves on Medano Creek this month at the Great Sand Dunes National Park. It’s a natural phenomenon that doesn’t happen every year,… ...

DR. VAUGHAN CORNISH has written a charming book, full of interesting observations. He starts with descriptions of waves and ripples in blown sand, and passes later to the similar forms produced ...

You have the sand, the sun and the water.” Waves form when water surges over ripples in the sand as it flows around the base of the dunes and spreads to become a wide, shallow stream .