Monte Perdido massif tectonic structure

In the Monte Perdido massif, the Gavarnie thrust together with the Monte Perdido system are the main structure responsible for the Pyrenees as a mountain belt, but also it is the generator or part of the subsidence that made possible the existence of the South Pyrenean synorogenic basin (Seguret, 1972). The spectacular fold and thrust stack of Monte Perdido system is partly responsible for producing the highest limestone massif in Western Europe. It includes rocks from Paleozoic to Paleogene as part of the Gavarnie thrust footwall; Devonian rocks compose the hangingwall (Rousell, 1904; Van der Velde, 1967).
The Monte Perdido system formed during the Lutetian to Bartonian (Eocene) (Pujalte et al., 2016). It is composed of several sheets affecting rocks from upper Cretaceous to Eocene. The entire system was folded during the displacement of the Gavarnie thrust, from Bartonian to Rupelian (Oligocene) (Labaume et al., 2016). Due to this major structural feature, the Monte Perdido system is tilted to the south and is the southern flank of a great anticlinal of regional scale (Muñoz et al., 2013).
The transfer of deformation to the south associated with the Gavarnie thrust is related to the generation of important folds and syntectonic sediments located in the South Pyrenean synorogenic basin.