Field studies have led to the proposal of an updated evaluation of the Hercynian structural history of Morocco, based on detailed mapping and structural analysis in the northwestern part of the Western Meseta. In this study, we focus on the Rabat-Tiflet Fault Zone (RTFZ), which corresponds to the North Mesetian Shear Zone (NMSZ). It lies at the boundary between the Mesitian domain to the south, which marks the northernmost edge of the West African Craton (WAC), and the Sehoul Caledonian Block (SB) to the north, that belongs to the North American Craton (NAC). Field data shows that the Sidi Bettache Basin of Famenno-Dinantian age (SBB), bounded to the north by the NMSZ, consists of two contiguous basins: (i) The Sidi Bettache Basin stricto sensu (SBB s.s.), located east of the Coastal Block, opened during the Late Famennian as a response to an E-W extension. (ii) The Brachwa-Maaziz Basin (BMB) has been created during the Middle Visean, to the south of the SB, as a result of N-S extension. The Hercynian evolution of the NMSZ is marked both by the southward thrust of the SB, prior to the Middle Visean, and the northward thrust of the WAC, subsequent to the Visean. The latter event is recorded in the NMSZ by (i) ENE-WSW syn-schist folds with a northward vergence (first phase of NNW-SSE Variscan shortening which notably structured the BMB), followed by (ii) a significant steeply south-dipping dextral strike-slip fault, with a minimum displacement of 30 km, which is responsible for multi-scale tectonic lensing of rocks (sedimentary and magmatic, ranging from Upper Proterozoic to Visean), related to the NW-SE second episode of shortening which occurred during the counterclockwise rotation of the WAC. This tectonic chaos has been considered as the chaotic formation of the Famenno-Tournaisian. These data show that Moroccan Hercynian history must be seen in its global tectonic context, between the WAC to the South and the NAC to the W and NW.