Series

Oligocene Late Devonian Ludlow Early Ordovician Early Triassic Late Cambrian Middle Cambrian Middle Ordovician Late Ordovician Early Cambrian Holocene Pleistocene anthropocene Early Jurassic Late Cretaceous Late Jurassic Middle Jurassic Cambrian Series 2 Early Devonian Middle Devonian Early Cretaceous Palaeocene Pliocene Miocene Eocene Late Triassic Middle Triassic