Abstract
Regional structure of Precambrian rocks suggests a tectonic style of large scale upright open synforms and antiforms, with axial-trace trending and fold axes plunging to the northwest. We propose that Precambrian structural highs, emerging through the present erosional surface, are northwest-southeast trending tectonic wedges formed by strike-slip faults. During the late Jurassic uplift of the Somali plateau, these faults initiated and were reactivated in the Late Pleistocene period. A right-lateral component is deduced from regional geometry of fault-pattern, spatter cones and maars alignment. In spite of the spectracular morphology shown by this fault system, geological considerations suggest that faults have reactivated ancient structures.
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