Abstract
Abstract The north-south fault along the 4 degrees 50' meridian is one of the major structural trends of the Ahaggar mountains, Algeria. It separates Suggarian (Precambrian) deposits on the east from Pharusian (Precambrian) deposits on the west. A north-northeast-south-southwest- trending horst, the Timg'aouine horst, about 120 kilometers long and averaging 15 kilometers in width, lies west of the fault. Large lava flows are associated with the faults bounding the horst. The presence of this Suggarian unit played an important role in the structural development of the surrounding Pharusian basin.
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