Corisco, ko Mandj, karamin tsibiri ne na Equatorial Guinea, wanda ke da nisan kilomita 29 (mil 18) a kudu maso yammacin gabar Río Muni wanda ke bayyana iyaka da Gabon. Corisco, wanda sunansa ya samo asali daga kalmar Portuguese don walƙiya, yana da yanki kawai 14 km2 (5 sq mi), kuma mafi girman matsayinsa shine mita 35 (ƙafa 115) sama da matakin teku. A lokacin Zamanin ƙarfe (50 BC - 1400 AD) kuma kafin zuwan Turawan Fotigal, tsibirin ya zauna sosai. Mafi mahimmin shaidar shaidar zaman ɗan adam ta fito ne daga yankin Nandá, kusa da gabar gabashin, inda aka binne dimbin kaburbura da suka gabata. Wadannan jana'izar suna cikin lokuta biyu daban-daban: Zamanin ƙarfe na farko (50 BC - 450 AD) da Middle Iron Age (1000-1150 AD). A lokacin farko, mazaunan tsibirin sun ajiye tarin kasusuwa na mutane da kayan aikin ƙarfe (gatari, mundaye, mashi, cokula, kuɗin ƙarfe) a cikin rami mara zurfi da aka haƙa cikin yashi.