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Home > All Images > 1999 > September > 17 Sep 1999

Images Dated 17th September 1999

Choose from 12 pictures in our Images Dated 17th September 1999 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Balancing rock caused by water erosion Featured 17 Sep 1999 Print

Balancing rock caused by water erosion

Earth pillar. Earth pillar erosion feature. This type of feature is also known as a demoiselle. The pillar is made of soft sedimentary rock, and it is topped by a flat cap of harder rock. Occasional heavy rains erode much of the pillar, but the neck is protected by the hard rock above it. Such structures are common in semi-arid areas, such as in these badlands in Utah, USA

© G. BRAD LEWIS/SCIENCE PHOTO LIBRARY