ocr: Back 12 - (8) D . ) 6 5 t - / 425m years ago... 35Um years ago... 360m years ago... 270m years ago.. 425 million 400 million 375 million 350 million 300 million 275 million 250 million 420m years ago... 370m years ago... 300m years ago... 270m years ago... 400m years ago... 340m years ago... Devonan Mississippian Pennsyivaman 1bimyal tu 286imya) 412imya) to 354(myal 354myai to 315imya) Permian 286/myal to 248/mya)
