In the Atlas-Meseta basins of Morocco, early Carboniferous clastics comprise wave-dominated shelf sediments, turbidites, and mass-flow deposits. Crustal extension controlled the formation of troughs, continental uplift, and general marine subsidence; sedimentation passed from turbidites into storm deposits. The Moroccan Meseta formed a complex marine basin composed of deep troughs, shallow shelves, and islands. The late Visean marine transgression advanced from the north and reached as far south in the High Atlas domain as the Tizi n'Test fault zone. The Variscan compressive phase ended the early Carboniferous sedimentation.