Castildetierra

The hillock called, Castildetierra, is one of the most characteristic corners of the Bardenas of Navarra. A Natural Monument, which evidently shows us one of the most characteristic forms of area Bardenas erosion. This hillock, has been eroded in this way because at the top there is a hardest rocks, which are more resistant to erosion by wind and water, and protect the other, softer inferior materials. This erosion over hundreds of thousands of years has left this very characteristic form.
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