<p>This study re-evaluates the Urgonian series in the Ardèche Gorges through detailed fieldwork and a re-examination of thin sections from six key cliff and road sections (Révaou–Serre de Tourre, Autridge, Rouveyrolle, Rouvière, Saint-Marcel, and Aiguèze). Two additional reference sections (Pont d’Arc and Mézelet), previously investigated by other authors, are incorporated for regional correlations. The main objective is to establish and correlate stratigraphic sequences of the Ardèche Gorges through comparison with the established Urgonian framework of southeastern France (Provence and the Subalpine Chains). Several emersion and drowning surfaces are recognised and tentatively correlated across the sections. An additional aim concerns the recognition and characterization of rudist faunas through the sucession. Facies changes point to a south-eastward trend toward more proximal environments during the deposition of the Urgonian limestones, challenging earlier interpretations that stacked these sections stratigraphically. Notably, the Mézelet section records a major hiatus at the top of the Urgonian succession, spanning the Barremian–Aptian boundary and directly overlain by the open-marine marls of the Chabert Formation. In contrast, the Aiguèze section preserves a continuous inner-platform succession across the same time interval and, for the first time ever, yields an unequivocal early Aptian rudist fauna (Saint-Montan fauna) across the entire southeastern French Urgonian-type domain. This discontinuity at Mézelet most likely reflects the latest Barremian eustatic sea-level fall, although a concomitant tectonic control cannot be ruled out.</p>