Cable car rising 753m through thrust fault. The cliff face shows older rocks pushed over younger ones during Alpine mountain building, a case of tectonic compression visible from a gondola.
Juan Fernández, CC BY-SA 2.0, via Wikimedia Commons
A ride through deep time
The Fuente Dé cable car travels 1,450 meters in length, ascending a 753-meter vertical rock face in under four minutes. The ride takes passengers through a dramatic geological inversion. The massive gray cliffs of the Picos de Europa are composed of Carboniferous limestone, a rock layer formed on a shallow marine platform roughly 325 million years ago. Below these ancient rocks, visible near the base of the mountain, are younger layers of reddish sandstone and mudstone from the Permian and Triassic periods, approximately 250 million years old.
This inverted stratigraphy, where older rocks sit on top of younger ones, is caused by a massive thrust fault. A thrust fault is a type of reverse fault with a low angle, where compressional forces push one block of crust up and over another. The sheer limestone wall ascended by the cable car is the exposed face of this immense geological structure. The fault line represents a clean break where an entire sequence of older Carboniferous rock was shoved horizontally for kilometers, ultimately resting on top of much younger Mesozoic sediments.
The Alpine collision
The forces required to create this structure originated with the Alpine orogeny, a mountain-building event that began around 50 million years ago. This process was driven by the collision of the African and Eurasian tectonic plates. The Iberian Peninsula, caught in the collision, was compressed, causing the reactivation of older faults from a previous mountain-building event, the Variscan orogeny. This intense pressure folded and fractured the existing Paleozoic and Mesozoic rock layers.
The thick, competent Carboniferous limestone acted as a single, massive unit. Instead of folding, it broke and was thrust southward over the weaker, younger clastic rocks. The result is the dramatic terrain seen today. The upper station of the cable car sits at an elevation of 1,850 meters on this displaced block of ancient limestone. From this vantage point, the surrounding high peaks are all part of this allochthonous, or non-native, rock sheet. The valley below, where the cable car begins its journey, represents the autochthonous, or native, younger rock layers that were overridden. The entire structure is a case of large-scale tectonic shortening, made unusually accessible by modern engineering.
💡Fun Facts
The cable car travels at a speed of 10 meters per second, completing its ascent in about 3 minutes and 40 seconds.
The limestone of the Picos de Europa is heavily affected by karstification, a process where water dissolves the rock, creating extensive underground cave systems. One cave extends 1,441 meters below the surface.
The Picos de Europa range was part of Spain's first National Park, established in 1918.
During the Carboniferous period when the limestone was forming, the landmass that is now Spain was located in tropical latitudes near the equator.
Summer hours are typically 9:00 to 20:00; winter hours are 10:00 to 18:00. The cable car often closes for maintenance from mid-January to mid-February.
Admission
Adult round-trip tickets cost approximately €17-€24, depending on the season. One-way tickets are also available.
Accessibility
The base and top stations have cafes and viewing platforms that are accessible. The surrounding terrain at the top station is a high-mountain environment with uneven, rocky paths.
