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The Castildetierra formation Photograph by Leyre Monreal, 2019 |
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Although it might appear to
be a sculptural relic, the Castildetierra formation in the Bardenas
Reales
in southeast Navarre, Spain,
results from harder
sandstone and limestone layers protecting softer clay beneath from
erosion. Over time, wind and rain removed the softer material,
leaving the distinctive pinnacle visible today. |
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