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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Prehistory of Northern Nigeria ： ウィキペディア英語版 Prehistory of Northern Nigeria The pre-history of Northern Nigeria spans the period covering from the early history of the planet to the time of written historical records. There has been very little investigation in to the History of Northern Nigeria before the rise of human civilisation. ==Iron Age== Kainji Dam excavations revealed ironworking by the 2nd century BC. The transition from Neolithic times to the Iron Age apparently was achieved without intermediate bronze production. Others suggest the technology moved west from the Nile Valley, although the Iron Age in the Niger River valley and the forest region appears to predate the introduction of metallurgy in the upper savanna by more than 800 years. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prehistory of Northern Nigeria」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.