It’s Outcrop of sedimentary rocks of the Albian “Early Cretaceous”.
Metlili is a town and commune, and capital of Métlili District, in Ghardaïa Province, Algeria.
Metlili lies at an elevation of about 500 metres (1,600 ft) in a valley running from northwest to southeast between arid, rocky hills. The town is about 12 kilometres (7.5 mi) from end to end, but only about 0.5 kilometres (0.31 mi) wide.