{"timeline":{"defaultZoomLevel":"0","height":600,"asset":{},"date":[{"asset":{},"startDate":"-4600","endDate":"-4000","headline":"Hadean Eon","text":"

Formation of the Earth (in millions of years)<\/p>\n"},{"asset":{},"startDate":"-4000","endDate":"-2500","headline":"Archean Eon","text":"

In millions of years.<\/p>\n\n

Archean Eon had the following:<\/p>\n\n

- Formation of Earh's crust<\/p>\n\n

- Primitive atmosphere formation: CH4 and CO2-dependent <\/p>\n\n

- Fossil evidence of prokaryotic life <\/p>\n\n

- Evidence of stromatolites <\/p>\n"},{"asset":{},"startDate":"-2750","endDate":"-2500","headline":"Neoarchean Era","text":"

Oxygenic photosynthsis<\/p>\n"},{"asset":{},"startDate":"-1000","endDate":"-540","headline":"Neoproterozoic Era","text":"

Hyporhesized snowball Earth<\/p>\n"}],"language":"en","headline":"Precambrian Time Period","text":"

This timeline provides a better understand of what might have happened during the Precambrian portion of the geological timeline (4 billion to 700 million years ago). <\/div>\n","backgroundImage":{"path":"images\/backgroundImage-65e3ee531fe29.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":930,"height":464}}}

Geological Timeline: Precambrian Period

Gagan Josan