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The tracks of the giant marine worm

Navas de Estena, Montes de Ciudad Real, Ciudad Real

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The tracks of the giant marine worm

Curiosity · Navas de Estena, Montes de Ciudad Real, Ciudad Real

The rocks of the Boquerón del Estena preserve the fossilised traces of a giant marine worm from some 475 million years ago, alongside ripple marks from ancient sea beds.

Photo: Juan Manuel González Morales (CC BY-SA 3.0 es)

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