Geography ;The Early Earth

The Early Earth 

 

The early Earth was like a blurred patch of scalding rock and chocking fumes . But the space , in which it was floating , was  cold so the surface of the EARTH also began to cold , So the surface of the Earth also began to cool down . Approximately 3,000 million years ago , the Earth was cool enough for land masses to form . Even so , our planet remained an alien world for the next several hundred million years . Rafts of solid rock drifted in the magma like dark ice floes .  

Atmosphere ,Weather and Oceans

-) Gases , carbon dioxide , nitrogen , gusted out from the cooling rock and enveloped the planet in a blistering atmosphere devoid of oxygen . As the Earth cooled, the steam began to condense into water , and the water ran down wherever the rocks were lower , which perhaps made the first oceans . These first oceans may have been short-lived . Space rubble 

left over from the birth of the planets bombarded Earth continuously .

   

The greatest impact might have boiled the oceans away, forcing the process of cooling and condensation , which in turn gave rise to weather conditions , clouds ,thunderstorms and rain . The rain finally filled the ocean basins . 

The Eons and Eras           

     

The Earth's history has been divided into geological time units like Eons and Eras , which further break up into Periods and Epochs . The first Eon is called the Hadean , during which the Earth's surface was under severe volcanism due to the large heat  flow and geothermal gradient . By the beginning of the next Eon , Archaean , the Earth had cooled significantly and primordial life to evolve .