Concept
Opi (archaeological site)
Opi is a community in Enugu State of southeastern Nigeria. It is populated by the Igbo people and located in Nsukka region. It is the location of a prehistoric archaeological site which contains iron smelting furnaces and slag dated to 750 BC. Iron ore was smelted in natural draft furnaces and molten slag was drained through shallow conduits to collecting pits forming huge slag blocks weighing up to 47 kg. The operating temperatures are estimated to have varied between 1,155 and 1,450 °C.
Official source
About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.