泥盆纪
泥盆纪（英语：Devonian，符号D）是地质时代古生代中个第四个纪，开始拉同位素年龄416±2.8百万年（Ma），结束于359.2±2.5Ma。
泥盆纪拉英语中叫Devonian，名称来自英国德文郡，因该地个泥盆纪地层被最早研究。
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