This study focuses on the metabasite rocks of Nemba Complex Mayombe belt, an African segment Araçuaï-West Congo Orogen (A-WCO) extending from southwest Gabon to northwest Angola. These outcrops are in southwestern along Loukounga river. The complex is Neoproterozoic age and represents lower part west congolian Supergroup. objective this constrain geodynamic context petrology geochemistry metaba...

In the Catalonian Coastal Ranges, Paleozoic sedimentary and meta-sedimentary rocks crop out in severa1 areas, intruded by late tectonic Hercynian granitoids and separated by Mesozoic and Tertiary cover sediments. Large structures are often difficult to recognize, although a general east-west trend can be observed on the geological map. Deformation was accompanied by the development of cleavages...

Many of the definitions given below were adopted by the SCMR without difficulty; others gave rise to considerable debate. Problems arose for a variety of reasons, namely: the variable usage of terms across the geological community (e.g. gneiss and schist); terms such as slate and cleavage proved difficult because there are no similar terms in many non-English speaking countries; equally, the di...

In the eastern Rif unit of Jbel Harcha which is part Beni Bou Ifroure massif, latter belongs to chain was formed during Alpine orogeny. Lithostratigraphic analysis geological map and field investigations shows that this constituted by carbonate facies limestone attributed lower middle Jurassic. At level upper Jurassic Cretaceous we observe metamorphic terms presented schists. The structural exa...