The proterozoic climate was still warm and wet , but compared with that of the archaeozoic eon , the temperature fell a little .
元古宙的气候仍是温暖而潮湿的,但较太古宙温度有所降低。
In the end , the relation between the metallogenesis and the evolution of archaeozoic and early proterozoic earth crust is discussed basing upon the theory of rift .
最后采用裂谷理论讨论了成矿作用与太古代和早元古代地壳演化的关系。
Geologists trace this phase back to a time a billion or more years ago during the so-called proterozoic era long before the appearance of plants and animals with their well-ordered body plans and fully differentiated cell types .
The model showed that a partial pressure of only 2.9 millibars of co 2 would have been needed during the late archaean and early proterozoic periods in order to bring the surface temperature of the earth above freezing .
The genes needed to fashion the primitive cellular aggregates of the proterozoic era did not all become defunct . Some were incorporated into the genomes of later more sophisticated organisms and lurk inside human beings to this day .