rhaetian stage
31Maastrichtian — System Series Stage Age (Ma) Paleogene Paleocene Danian younger Cretaceous Upper …
32Danian — System Series Stage Age (Ma) Neogene Miocene Aquitanian younger Paleogene Oligocene …
33Pennsylvanian — This article is about the geologic subperiod. For passenger train, see Pennsylvanian (Amtrak). System Subsystem/ Series Stage Age (Ma) Permian Cisuralian Asselian younger …
34Piacenzian — System Series Stage Age (Ma) Quaternary Pleistocene Gelasian younger Neogene Pliocene …
35Ordovician — Period 488.3–443.7 million years ago …
36Messinian — System Series Stage Age (Ma) Quaternary Pleistocene Gelasian younger Neogene Pliocene …
37Coniacian — System Series Stage Age (Ma) Paleogene Paleocene Danian younger Cretaceous Upper …
38Middle Jurassic — System Series Stage Age (Ma) Cretaceous Lower Berriasian younger Jurassic Upper Tith …
39Dockum Group — The Dockum is a Late Triassic (approximately late Carnian through Rhaetian, or 223 200 Ma) geologic group found primarily on the Llano Estacado of western Texas and eastern New Mexico with minor exposures in southwestern Kansas, eastern Colorado …
40Cambrian — For other uses, see Cambrian (disambiguation). Cambrian Period 542–488.3 million years ago …
