ABSTRACT
The Adola Belt is characterized by two major rock associations arranged in five intercalated lithostructural domains. The first group constitutes the high grade, polydeformed and metamorphosed schists and gneisses whereas the second group consists of metavolcano-sedimentary secessions and ultrabasic rocks. The map of the Adola Belt and the surrounding areas shows the relationship between the Adola, Moyale and Bulbul Belts, the major NW-SE faults and the N-S trending Wadera shear zone. The volcano-sedimentary sequence and ultrabasic rocks which forms most part of the Adola Belt are terminated against NW-SE trending regional Dhedhessa-Adola strike-slip shear zone of dextral sense. The Dhedhessa-Adola shear zone is interpreted as a lateral ramp of the eastward verging thrusts of the Adola Belt. The Bulbul Belt is dominated by easterly dipping thrusts with westerly transport direction. The Adola and Bulbul Belts with opposing tectonic transport direction are accommodated along the crustal scale Wadera shear zone with sinustral strike-slip shear sense.
