前寒武纪铁建造中的金矿床是世界上一种重要的金矿类型，深受国内外地质工作者的重视。
Gold deposit in Precambrian banded iron formation is an important type of gold ore, which has been paid more attention by many domestic or alien geologist.
古生代是地质时期的一个时代，从前寒武纪末开始，到中生代初，大约从5.7亿年前到2.25亿年前。
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic, or from about 570 to about 225 million years ago.
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