20 Mya to 15 Mya

 20 Mya to 15 Mya

15.97 Mya, Neogene, Miocene, Langhain: Extinctions in Middle Miocene disruption.

15 Mya to 10 Mya(?)

 15 Mya to 10 Mya

13.82 Mya: Neogene, Miocene, Serravaillan: Warmer climate during Middle Miocene.

12 Mya: About this time there was a massive, explosive volcanic eruption on the border of what is now Argentina and Bolivia. Cerro Panizos of the Altiplano Puna volcanic complex.

11.830 Mya: About this time a massive, explosive volcanic eruption occurred at what is now the Bruneau/Jarbridge, Yellowstone hotspot in Idaho, USA. It was responsible for the Ashfall Fossil Beds 1,600 km to the east.

11.63 Mya: Neogene, Miocene, Tortonian: Gradual separation of human and chimpanzee ancestors. Sahelanthropus tchadensis in Africa. 

11.7 Mya, Greenlandia Age of the Holocene Epoch: Current interglacial begins. Sea level flooding of  Doggerland and Sundaland. Sahara desert forms. Neolithic agriculture was practiced.(?)