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sandstone erosion

Hornby Island, BC, Canada.

 

A foam-like structure in the erosion, near where the wave action is strong. But the sandstone looks uniform.

 

This formation is called "tafoni" or "honeycomb weathering".

en.wikipedia.org/wiki/Tafoni

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Uploaded on May 28, 2009
Taken on July 13, 2004