Glacier striations on polished surface of rock outcrop. Sumapaz Parque Nacional Natural. Colombia, South America.

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Photo credit: © Gabbro / Alamy / Afripics
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Keywords: america, american, colombia, colombian, geology, glaciation, glacier, nacional, natural, nature, outcrop, parque, polished, rock, sign, south, striae, striations, sumapaz, surface, travel