La serie de base adoudounienne de l'Anti-Atlas occidental marocain s'est deposee dans un contexte paleogeographique variable. Les premiers depots, carbonates et volcanosedimentaires, s'accumulent dans de petits bassins peu profonds sous un controle tectonique. Puis, la sedimentation devient silicoclastique et volcanodetritique, margino-littorale, deltaique dans le secteur occidental et laguno-lacustre dans le domaine oriental. Le volcanisme alcalin synsedimentaire et le rejeu normal des accidents structurant les milieux de depots temoignent d'une tectonique distensive intracontinentale, liee au rifting affectant le craton ouest africain lors du passage Precambrien-Cambrien.
The Adoudounian Basal Series within the western part of the Moroccan Anti-Atlas Mountains was deposited in a varying palaeogeographical setting. The first deposits of volcaniclastic and carbonate sediments accumulated in small shallow basins under tectonic control. Then, sedimentation became siliciclastic and volcano-detrital with coastal and deltaic sedimentation in the western area and lagoon-lacustrine in the eastern area. Synsedimentary alkaline volcanism, associated with normal faulting, indicates a within-plate extensional tectonic regime related to rifting, which affected the northern margin of the West African Craton, during Late Neoproterozoic-Early Cambrian times.