General tectonic framework
Above the Paleozoic period, Mesozoic and Paleozoic rock successions are deformed by dipping faults.
We can distinguish two different dipping faults systems, a lower one on the base involving specially the Paleozoic succession, and an upper one on top involving the Mesozoic and Paleogene successions. .
The South-central Pyrenees have a distinguishing ESE-WNW structural orientation. Nevertheless, we find structures tending to cross north-south in some areas. These N-S structures are especially important in understanding the folding of the Pyrenees in the County.
On the whole, these N-S structures have been interpreted as the surface of the lateral slopes of thrusting layers that moved southwards. In Sobrarbe County, the N-S structures on top represent the connection between the ENE-WSW orientated ones in the north-west and those equally orientated in the south-east.
Avda. Ordesa 79. 22340 Boltaña. Huesca. 974 518 025. geoparque@geoparquepirineos.com