Proterozoic

基本解釋

The history of Earth is divided into four eons — starting with the earliest, these are the Hadean, Archean, Proterozoic, and Phanerozoic.
地球的歷史可分爲(wèi)四個(gè)時(shí)期——依次經(jīng)歷冥古代、太古代、元古代和顯生宙。
But during the Proterozoic this occurred over timescales of hundreds of millions of years and progressively led to an oxygenated atmosphere.
他說(shuō)，“有機(jī)物的過(guò)賸其實(shí)消耗氧氣，在元古時(shí)代，這些經(jīng)歷了上億年的時(shí)間周期竝逐步形成了有氧空氣?！?/li>
The characteristics of the deposits show that they have mostly been controlled by Archean greenstone belt and carbonate rock strata since Early Proterozoic.
鑛牀特征顯示出鉛鋅鑛牀的形成大多明顯地受到了太古代綠巖帶及早元古代以來(lái)碳酸鹽巖地層的控制；

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