The spectacular cliffs on the west coast of Gipuzkoa hide a unique natural treasure: millions of years of geological history embedded in the successive rock strata which has been uncovered due to the incessant action of the waves. This distinctive formation of nature is called 'flysch', which is the distinguishing feature of the whole coastline. Its unique geological value is the sequence of flysch strata that forms a near-continuous series spanning 60 million years (from about 110 to 50 million years ago), and where major events and cataclysmic disasters that have affected the history of Earth have been recorded, including the last great mass extinction that took place on a global scale. It is therefore no surprise that several strata are international geological standards for dating events in the pre-history of the planet.
Basque Coast Geopark
The Basque Coast Geopark is a small area wedged in between the Bay of Biscay and the Basque mountains and comprising the municipalities of MUTRIKU, DEBA and ZUMAIA. Since 2010, it is a memeber of the European and Global Geoparks Network, supported by UNESCO. Geology is the true protagonist of a landscape that preserves the history of some of the most dramatic episodes in the Earth’s recent history.