STEVE PERCIVAL / SCIENCE PHOTO LIBRARY STEVE PERCIVAL / SCIENCE PHOTO LIBRARY
Seaweed fossil in rock. Fossils are the preserved remains of plants and animals from prehistoric times. This rock and the fossil formed under an ancient sea, and was later uplifted to this location. This fossil was found at an altitude of around 3500 metres above sea level, near Cafayate, Jujuy Province, Argentina.
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