In various parts of the world, the continent of Africa is struggling with the phenomenon of terrorism and extremism more than other regions. This continent, for various reasons, including the various weaknesses of software and hardware, including economic backwardness, political instabilities, social inequalities, and foreign interventions that find their interests only in insecurity and instab...

Arc continent collision is one of the most fundamental tectonic processes for the formation of new land, and the preservation on land of fragments of oceanic lithosphere (ophiolites). However, the tectonic evolution of arc continent collision is commonly over-simplified in everything from introductory textbooks to complex tectonic models. Major unresolved issues include the response of the fore...