Ordovician Period (6 фев 488000000 г. до нашей эры – 6 фев 416634490 г. до нашей эры)

The area North of the tropics was mostly entire ocean, and most of the world's land was collected into the Southern supercontinent GondWana.

6 фев 488000000 г. до нашей эры

6 фев 416634490 г. до нашей эры

~ 5883516 years