Proterozoic

基本解释

The history of Earth is divided into four eons — starting with the earliest, these are the Hadean, Archean, Proterozoic, and Phanerozoic.
地球的历史可分为四个时期——依次经历冥古代、太古代、元古代和显生宙。
But during the Proterozoic this occurred over timescales of hundreds of millions of years and progressively led to an oxygenated atmosphere.
他说，“有机物的过剩其实消耗氧气，在元古时代，这些经历了上亿年的时间周期并逐步形成了有氧空气。”
The characteristics of the deposits show that they have mostly been controlled by Archean greenstone belt and carbonate rock strata since Early Proterozoic.
矿床特征显示出铅锌矿床的形成大多明显地受到了太古代绿岩带及早元古代以来碳酸盐岩地层的控制；

the later of two divisions of the Precambrian era, during which the earliest plants and animals are assumed to have lived &rarrcompareArchaeozoic
of or formed in the late Precambrian era