bajocian
41Oligocene — System Series Stage Age (Ma) Neogene Miocene Aquitanian younger Paleogene Oligocene …
42Pennsylvanian — This article is about the geologic subperiod. For passenger train, see Pennsylvanian (Amtrak). System Subsystem/ Series Stage Age (Ma) Permian Cisuralian Asselian younger …
43Permian — For the language family, see Permic languages. For the high school, see Permian High School. For the geological basins, see Permian Basin. Permian Period 299–251 million years ago …
44Paleozoic — era 542   251 million years ago Key events in the Paleozoic view • edit …
45Precambrian — For the album by German band The Ocean, see Precambrian (album). Precambrian Period 4567.17–542 million years ago …
46Younger Dryas — Three temperature records, the GRIP sequence (red) showing the Younger Dryas event at around 11.0 ka BP. The vertical axis shows δ18O, which is a temperature proxy showing the water molecule isotopic composition of 18O in an ice core …
47Wellingborough — Coordinates: 52°17′38″N 0°41′47″W …
48Mesoproterozoic — era 1600   1000 million years ago Key events in the Mesoproterozoic view • edit …
49Cryogenian — Period 850–630 million years ago …
50Mesoarchean — The Mesoarchean (  /ˌmiːz …
