Schematic representation of a rifted margin and two stages of convergent maturity highlighting the position of the front of the thick-skinned deformation with respect to the former necking line. a) The proximal, distal and oceanic domains are illustrated as well as the main structural limits between them (necking line, Outer limit of Continental crust (OLCC) and landward limit of Oceanic Crust (Laloc). b) In an early Orogenesis convergent stage the front of the thick-skinned deformation doesn’t no traverse the former necking line. c) In a mature collision stage, the front of the thick-skinned deformation traverses the former necking line thus involving formerly un-thinned continental crust.