Abstract
The Urals were formed at the end of the Paleozoic by the accretion of several lithospheric elements. A complete accretionary complex is developed at the collision zone, including: offscraping sediments, an accretionary prism, ophiolitic units and a high pressure belt. Geophysical and geological data suggest that this orogen is preserved since its formation, without evidences of post-orogenic collapse or later reactivations.