Somontano provides a perfect opportunity to learn how the landscape around us was formed. A visit through the region reveals signs of geological processes that explain the existence of mountains and valleys, canyons and stone pillars, rocky outcrops and cliffs.

Start your journey here to see the main points of geological interest in Somontano.

At the entrance to Abiego on the road from Bierge there is an interesting collection of over 1000 ichnites preserved in a layer of limestone. They are the fossilized footprints of herds of herbivores, now extinct, that lived on what were meadows dotted with small lakes. They are thought to correspond to the artiodactyla group of mammals, possibly the Anoplotherium or Entelodon.

Between 35 and 40 million years old, they date back to between the Eocene and Oligocene periods. Originally left in mud, the footprints filled with leaf and plant residue, which protected them from erosion.

Impressive rock “pleats” that are found in the Alcanadre Canyon, at the end of the area known as Gorgas Negras and at the beginning of the Barrasil Canyon. They are the result of Alpine orogeny.

This undulating valley is clearly visible from the main road that runs from Bierge to Rodellar. It was formed by the River Isuala and follows the curved line of an anticlinal fold and is framed by a series of crests that represent all that remains of eroded layers. 

 Route: Por la Cresta de Balced. Rodellar-Las Almunias