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What an amazing and beautiful place…The cloud cover was perfect and it look like a storm was brewing… :P These dunes are like in the middle of nowhere, surrounded by mountains on two sides…
The dunes were formed from sand and soil deposits of the Rio Grande and its tributaries, flowing through the San Luis Valley. Over the ages, westerly winds picked up sand particles from the river flood plain. As the wind lost power before crossing the Sangre de Cristo Range, the sand was deposited on the east edge of the valley. This process continues, and the dunes are slowly growing. The wind changes the shape of the dunes daily.

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