The Cadomian Orogen is recognized in the Iberian Peninsula as an extremely thick, Ediacaran to Terreneuvian volcanosedimentary complex that has been folded, thrusted, and metamorphosed by Cadomian and Variscan processes, a chronological distinction that sometimes represents a challenge. The intrusion of Cadomian-related granitoids commenced in the Cryogenian, as emphasized by the analysis of detrital and inherited zircon populations, but Cadomian magmatic and metasedimentary rocks currently exposed are exclusively Ediacaran‒Fortunian in age. The final intra‒Terreneuvian collapse of the Cadomian arc and retroarc basins led to the beginning of rifting conditions, where successive uplift pulses favored the erosion and reworking of the Cadomian basement.