[10]-[12]. Tertiary, a two episodic compression phase, first NW-SE and NS, took the old NE-SW normal faults
as reverse faults or sinistral detachment-duplication. The transverse faults WNW-ESE trending dextral offsets
are reactivated. This compression that initiates the closing of the Atlas basins from the Eocene materializes during
the Oligo-Miocene and Pliocene-Quaternary [4]-[12].
Hydrologically, High Atlas contains a set hydrogeological units of communicating with each other: The Lias
forming a relatively continuous system, Aalenian and Dogger. The Aalenian form and Dogger aquifer systems,
fragmented into separate basins in each synclinal basin and usually without communication, sometimes with
multiple aquifer levels. The waterproof series Toarcian-Aalenian separates between aquifers sets of lower Lias
Domerian and those of the Aalenian Dogger. Communications between aquifers are only possible thanks holes
[13].
The depth of the water, according to a survey conducted in February 2014 at twenty points of water varies
from a few meters to more than sixty meters. Productivity can exceed 100 l/s in the Liassic formations fractured
(FoumTillicht, Tazmamert, Kheng∙∙∙) with a mineralization generally less than 2 g/l. These aquifers give rise to
several sources, the most important are those of Sidi Hamza Zaouiet.