The geological formation with which inselbergs are commonly associated in Nigeria is the?

Inselbergs are commonly associated with the basement complex geological formation in Nigeria. The basement complex is a formation of ancient rocks that underlie most of Nigeria and other countries in West Africa. It is characterized by resistant rocks that have withstood millions of years of erosion, resulting in the formation of inselbergs, which are steep-sided hills or mountains rising abruptly from a plain. Therefore, the correct answer is basement complex.