GEOPARKEA - ALGORRI PREVIUW/Game of Thrones loc.

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The cliffs of Zumaia's flysch are formed by well-defined layers of rock. These layers are called strata and were formed through the slow sedimentation of sediments millions of years ago beneath the sea. 20 million years ago, all these marine bottoms rose along with the Pyrenees, and today they give rise to this great formation known as flysch. For geologists, the flysch of Zumaia is like an open book on the history of the Earth. An 8-kilometer-thick book that spans 50 million years, layer by layer, telling some of the most important climatic and biological episodes in recent geological history. There are surprises. The history of the Earth is dotted with large environmental changes that allow us to look at the present from a different perspective.