Geoparque Mundial UNESCO

Nº47 – Diamictites of El Endrinal Gorge

Geoparque Villuercas > Nº47 – Diamictites of El Endrinal Gorge


To reach the geosite, take a forest track that leaves the EX-118 to the right in the direction of Bohonal de Ibor, at kilometre 37. Follow this road, which coincides with the Casitas de Papel and Castañar de Ibor geological route. The geosite is 9.5 km from the start of the route, in the levels that outcrop on the right hand side. The path is a dirt forest track which in some sections is impracticable if you are not on all-terrain vehicles.


The site is floristically important for its variety of species. There is a juniper forest on the slopes next to the wall of quartz-arenites and ash trees, alder trees, laurel trees, laurustinus and riparian flora along the Endrinal stream.


This geosite is located on diamictite levels dating from the last stage of the Ordovician period (445 to 443 Ma) in which the planet suffered severe glaciations that caused a phenomenon of mass extinction of the species that inhabited its seas. In fact, this extinction is counted as the second largest in the geological record. A detailed description of these levels can be found in Geosite 28 (Cancho de la Trucha),

In this area, the diamictites include a shaly matrix comprising fragments of allochthonous rocks, which were transported by glacier ice from the existing South Polar ice cap that was located in the emerged areas of Gondwana. In their advance, these glaciers incorporated rock fragments until they reached the ocean, where the glaciers melted and these rock fragments fell and were incorporated into the muddy marine sediments, forming diamictites. In this way, the diamictites are a testimony to the great glaciation that caused the intense climatic changes that occurred at the end of the Ordovician.