Iron metallurgy may have been independently developed in the Nok culture between the 9th century BCE and 550 BCE.[14][15] The nearby Djenné-Djenno culture of the Niger Valley in Mali shows evidence of iron production from c. 250 BCE. The Bantu expansion spread the technology to Eastern and Southern Africa between 500 BCE and 400 CE, as shown in the Urewe culture.[16]
^ abcdChirikure, Shadreck (2015). Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy. SpringerBriefs in Archaeology. SpringerBriefs in Archaeology. pp. 17–30. doi:10.1007/978-3-319-11641-9. ISBN978-3-319-11640-2.
^Cite error: The named reference Alpern 2005 was invoked but never defined (see the help page).
^ abCite error: The named reference Killick_2004 was invoked but never defined (see the help page).
^ abClist, Bernard-Olivier (2013). "Our iron smelting 14C dates from Central Africa: from a plain appointment to a full blown relationship". The world of iron. Archetype Publications. pp. 22–28. ISBN978-1-904982-97-5.
^Eggert, Manfred (2014). "Early iron in West and Central Africa". In Breunig, P (ed.). Nok: African Sculpture in Archaeological Context. Frankfurt, Germany: Africa Magna Verlag Press. pp. 1–2.
^ abCite error: The named reference Holl-2020 was invoked but never defined (see the help page).
^Chirikure, Shadreck (2010). "On Evidence, Ideas and Fantasy: The Origins of Iron in Sub-Saharan Africa Thoughts on É. Zangato & A.F.C. Holl's "On the Iron Front"". Journal of African Archaeology. 8 (1): 25–28. ISSN1612-1651.
^Craddock, Paul (2010). "New Paradigms for Old Iron: Thoughts on É. Zangato & A.F.C. Holl's New Paradigms for Old Iron: Thoughts on É. Zangato & A.F.C. Holl's "On the Iron Front"". Journal of African Archaeology. 8 (1): 29–36. doi:10.3213/1612-1651-10157.
^Cite error: The named reference Bandama was invoked but never defined (see the help page).
^Bocoum, H. (ed.) 2004 The Origins of Iron Metallurgy in Africa: New Light on Its Antiquity – West and Central Africa. Geneva:UNESCO. p. 100.
^Eggert, Manfred K. H. (2010-10-25). "Too Old? Remarks on New Evidence of Ironworking in North-Central Africa". Journal of African Archaeology. 8 (1): 37–38. doi:10.3213/1612-1651-10158.