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Timeline of Ordovician research : ウィキペディア英語版 | Timeline of Ordovician research This timeline of Ordovician research is a chronological listing of events in the history of geology and paleontology focused on the study of earth during the span of time lasting from 485.4–443.4 million years ago and the legacies of this period in the rock and fossil records. ==18th century==
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「Timeline of Ordovician research」の詳細全文を読む
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