2. Geological Setting and Hydrogeological
The study area extends from the extreme east of the Central High Atlas to the western part of the Oriental High
Atlas. It is bordered to the north by the High Moulouya (Eastern Meseta), to the south by the oriental Anti-Atlas;
generally have a secession of wrinkles and depocentre (Figure 1). It contains shallow and deep aquifers.
The geological map of the study area (Figure 1) was developed from the geological map Midelt 1/200,000 [2]
and the geological map of Rich and Boudnib 1/200,000 [3]. Triassic, composed of detritus, basalt diabase and
sometimes evaporites, depends in angular unconformity on the deformed Paleozoic basement and structured by
several tectonic phases [4]-[6]. The Jurassic series form the major part of Mesozoic land of the High Atlas.It is
based conformably on the red formations Triassic-Lower Lias. Their lithology consists essentially of dolomite,
limestone, calcareous marl alternations and silico-clastic detritus [6]-[9].
Structurally, the expansion plan NW-SE, who reigned during the Triassic-Jurassic time, controlled the formation
of the Atlas basins. Rifting is initiated from the Triassic, while the individualization of these basins and
contemporary subsidence sedimentation took place during the Jurassic. The paleogeographic and morphostructural
part is dominated at the time by a system of blocks tilted largely towards the NW and to the SE. These
are limited by major NE-SW normal faults with ENE-WSW as separate from the WNW-ESE transfer faults