In the town of Zumaia in Spain are two beaches that contain a geologic treasure that contains millions of years of the Earth's history. The Itzurun and Santiago beaches are hotspots for geologists because it houses one of the longest continuous rock strata in the world called a 'flysch.'
This flysch in Zumaia was found to have formed over a period of over 100 million years by the crashing of the waves against the cliffs. The result is an abrasion platform with alternate hard layers and soft layers
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