tourismPallarsSobirà
El Pallars Sobirà is part of the Pyrenean Axial area. It contains structurally two large domes, the one called la Pallaresa and the other called l'Orri, separated by the syncline fold in Llavorsí. According to the interpretations of the geological section from ECORS, the units described clearly reflect the stacking of the three thrust sheets of rocks from the hercynian orogenic belt, called les Nogueres, l'Orri and Rialp.
El mantle of Rialp is the inferior and most modern, and it barely shows its head in Rialp. The mantle of l'Orri basically corresponds with the dome called l'Orri. The mantle of les Nogueres (unit of les Nogueres) is the superior and oldest one, affecting as well the rocks on the alpine basement, and would follow a route northwards to the dome of la Pallaresa.
The oldest rocks in the county are placed in the Cambrian and Ordovician. There are even rocks of volcanic origin, which, have been dated more than 580 millions years old after being tested with methods similar to the C-14 verification. There are also black slates with graptolites from the Silurian, limestones with crinoids, ceratids and trilobites from the Devonian, etc.
