The Pan-African orogeny in the late Proterozoic affected all of the Archean and Paleoproterozoic rocks in the region. Continent-continent collision and eastward subduction affected the southern Trans-Saharan mobile belt and emplaced granitoids throughout the Nigerian Province. In Nigeria, Pan-African orogeny related granite, syenite and diorite intrusions formed between 700 and 500 million years ago and are known as the Older Granites.[1]