Opi (shafin archaeological)
Opi al'umma ce a jihar Enugu dake kudu maso gabashin Najeriya.Kabilar Igbo ce ke da mazauna kuma tana cikin yankin Nsukka.sannan tana da wurin tarihi na wanda ya ƙunshi tanderun narkewar baƙin ƙarfe da slag mai kwanan wata zuwa 750 BC.An narkar da taman ƙarfe a cikin tanderu na halitta kuma narkakkar da aka zubar ta hanyar magudanar ruwa don tattara ramuka masu girma da yawa masu nauyin kilo 47. An ka ida yanayin zafin aiki ya bambanta tsakanin 1,155 da 1,450 °C.

Nassoshi