A two-steps evolution of the North Iberia distal margin from geological constraints provided by the Urdach and Saraillé mantle bodies and adjacent formations (see companion paper Lagabrielle et al., 2019, for data relative to the Urdach massif). Syn-metamorphic extensional deformation continued in the Saraillé area (beneath a cover of Albian-Cenomanian flysch) once extension ceased in the Urdach area (See Clerc et al., 2016 for more details of such evolution).