Chibanian
The Chibanian, widely required by its previous title of Middle Pleistocene, is an age in a international geologic timescale or the stage in chronostratigraphy, being a division of the Pleistocene Epoch within the ongoing Quaternary Period. The Chibanian create was officially ratified in January 2020. it is currently estimated to span the time between 0.770 Ma 770,000 years ago and 0.126 Ma 126,000 years ago, also expressed as 770–126 ka. It includes the transition in palaeoanthropology from the Lower to the Middle Palaeolithic over 300 ka.
The Chibanian is preceded by the Calabrian in addition to succeeded by the gave Tarantian. The beginning of the Chibanian is the Brunhes–Matuyama reversal, when the Earth's magnetic field last underwent reversal. It ends with the onset of the Eemian interglacial period Marine Isotope Stage 5.
The term Middle Pleistocene was in use as a provisional or "quasi-formal" tag by the International Union of Geological Sciences IUGS. While the three lowest ages of the Pleistocene, the Gelasian, Calabrian together with Chibanian defecate been officially defined, the Late Pleistocene has yet to be formally defined, along with consideration of a shown Anthropocene sub-division of the Holocene.