This clock representation shows some of the major units of geological time and definitive events of Earth history. The informal Hadean eon represents the time before fossil record of life on Earth, its upper boundary is now regarded as 4.0 Ga .Other subdivisions reflect the evolution of life; the Archean and Proterozoic are both eons, the Paleaozoic, Mesozoic and Cainozoic are eras of …
Jan 05, 2017· Yellow sand - black gold / الرمال الصفراء - الذهب (GC6YZCF) was created by Tiberoth on 1/5/2017. It's a Other size geocache, with difficulty of 2, terrain of 1.5. It's located in Bahrain.At the listed coordinates we find ourselves in a place that has changed the life in the region decisively.
