The mauritanian iron ore railway passes Africa's largest monolith Ben Amira, which is 540 meter a.s.l. or rises about 370 meter above the desert. The about 2 kilometer long loaded iron ore train M6 (called "mineralier 6") from the mine near Zouérate to the port of Nouadhibou is near PK 404 between Choum and Ben Amira, pulled by a typical SNIM consist of two SDL40-2 and a SD70ACS. CC # 118, CC # 127 and CC # 113 are in charge of the about 20000 ton train.
