Frederiksbergian*Albian
Gault*Albian
Solvan*Amgan
Guanlingian*Anisian
Urgonian*Aptian
Archeozoic*Archean
Arenigian*Arenig
Ordovician II*Arenig
Aktastinian*Artinskian
Baigendzinian*Artinskian
Warsaw*Arundian
Wufengian*Ashgill
Krumaian*Asselian
Surenian*Asselian
Uskalikian*Asselian
Atokan*Atokan/Derryan
Derryan*Atokan/Derryan
Auversian*Bartonian
Morrowan*Bashkirian
Gasperian*Brigantian
Saint Geneviere*Brigantian
St. Geneviere*Brigantian
Dreussian*Callovian
Piripauan*Campanian
Taylorian*Campanian
Caradocian*Caradoc
Trentonian*Caradoc
Middle Devonian*Cazenovian
Woodbinian*Cenomanian
Changshingian*Changhsingian
Changxingian*Changhsingian
Dewey Lake*Changhsingian
Dorashamian*Changhsingian
Chickasawhayan*Chattian
Geneyan*Cheneyan
Langsettian*Cheremshanskian
Chokierian*Chokerian
Black Riveran*Costonian
Blackriveran*Costonian
Blackriverian*Costonian
Montian*Danian
Desmoinesian*Desmoinian
Fengshanian*Dolgellian
Trempealeauan*Dolgellian
Caerfai*Early Cambrian
Georgian*Early Cambrian
Lower Cambrian*Early Cambrian
Waucoban*Early Cambrian
Durango*Early Cretaceous
Lower Cretaceous*Early Cretaceous
Helderbergian*Early Devonian
Lower Devonian*Early Devonian
Lower Eocene*Early Eocene
Lias*Early Jurassic
Lower Jurassic*Early Jurassic
Ziliujingian*Early Jurassic
Lower Miocene*Early Miocene
Lower Mississipian*Early Mississippian
Lower Oligocene*Early Oligocene
Canadian*Early Ordovician
Lower Ordovician*Early Ordovician
Lower Paleocene*Early Paleocene
Lower Pennsylvanian*Early Pennsylvanian
Cisuralian*Early Permian
Lower Permian*Early Permian
Rotliegendes*Early Permian
Xixianian*Early Permian
Calabrian*Early Pleistocene
Lower Pleistocene*Early Pleistocene
Lower Pliocene*Early Pliocene
Lower Silurian*Early Silurian
Buntsandstein*Early Triassic
Lower Triassic*Early Triassic
Scythian*Early Triassic
Ediacarian*Ediacaran
Neoproterozoic III*Ediacaran
Southwoodian*Eifelian
Deer Parkian*Emsian
Sawkillian*Emsian
Sipaian*Emsian
Clairbornean*Eocene
Canadaway*Famennian
Conewangan*Famennian
Conneautan*Famennian
Xikuangshanian*Famennian
Changshanian*Festiniogian
Franconian*Festiniogian
Shetianqiaoan*Frasnian
Sonyean*Frasnian
West Fallsian*Frasnian
Nuevo Leonian*Gallic
Trinitian*Gallic
Waltonian*Gelasian
Geneseean*Givetian
Taghanican*Givetian
Tioughniogan*Givetian
Ellesmerian*Griesbachian
Gangetian*Griesbachian
Gzelian*Gzhelian
Azoic*Hadean
Priscoan*Hadean
Rocklandian*Harnagian
Chouteau*Hastarian
Gamachian*Hirnantian
Salem*Holkerian
Hallian*Holocene
Hawera*Holocene
Recent*Holocene
Lockportian*Homerian
Maokovian*Kazanian
Filippovian*Kungurian
Irenian*Kungurian
Falangian*Ladinian
Croixian'*Late Cambrian
Furongian*Late Cambrian
Merioneth*Late Cambrian
Potsdamian*Late Cambrian
Upper Cambrian*Late Cambrian
Austinian*Late Cretaceous
Eagle Fordian*Late Cretaceous
Gulfian*Late Cretaceous
Upper Cretaceous*Late Cretaceous
Upper Devonian*Late Devonian
Upper Eocene*Late Eocene
Malm*Late Jurassic
Morrisonian*Late Jurassic
Upper Jurassic*Late Jurassic
Upper Miocene*Late Miocene
Upper Mississippian*Late Mississippian
Upper Oligocene*Late Oligocene
Bala*Late Ordovician
Balan*Late Ordovician
Upper Ordovician*Late Ordovician
Upper Paleocene*Late Paleocene
Upper Pennsylvanian*Late Pennsylvanian
Lopingian*Late Permian
Tatarian*Late Permian
Upper Permian*Late Permian
Zechstein*Late Permian
Tarantian*Late Pleistocene
Upper Pleistocene*Late Pleistocene
Upper Pliocene*Late Pliocene
Upper Silurian*Late Silurian
Keuper*Late Triassic
Upper Triassic*Late Triassic
Chazyan*Llandeilo
Llandeilian*Llandeilo
Miaopoan*Llandeilo
Abereiddian*Llanvirn
Guniutanian*Llanvirn
Llanvirnian*Llanvirn
Gedinnian*Lochkovian
Haumurian*Maastrichtian
Maestrichtian*Maastrichtian
Navarroan*Maastrichtian
Dresbachian*Maentwrogian
Gushanian*Maentwrogian
Menevian*Mayan
Feixianguanian*Meishan
Duckmantian*Melekesskian
Secondary*Mesozoic
Acadian*Middle Cambrian
Albertan*Middle Cambrian
Saint David's'*Middle Cambrian
St. David's*Middle Cambrian
Dogger*Middle Jurassic
Dyfed*Middle Ordovician
Guadalupian*Middle Permian
Ionian*Middle Pleistocene
Muschelkalk*Middle Triassic
Early Carboniferous*Mississippian
Lower Carboniferous*Mississippian
Cantabrian*Missourian
Bolsovian*Moscovian
Yongningzhenian*Olenekian
Midwayan*Oligocene
Aphebian*Paleoproterozoic
Primary*Paleozoic
Late Carboniferous*Pennsylvanian
Upper Carboniferous*Pennsylvanian
Astian*Piacenzian
Redonian*Piacenzian
Romanian*Piacenzian
Charmouthian*Pliensbachian
Siegenian*Pragian
Cryptozoic*Precambrian
Primordial*Precambrian
Jacksonian*Priabonian
Runangan*Priabonian
Yulongsian*Pridoli
Ufimian *Roadian
Latdorfian*Rupelian
Stampian*Rupelian
Tongrian*Rupelian
Vicksburgian*Rupelian
Sterlitamakian*Sakmarian
Tastubian*Sakmarian
Tonawandian*Sheinwoodian
Nammalian*Smithian
Kirkfield*Soudleyan
Ontarian*Telychian
Heersian*Thanetian
Landenian*Thanetian
Courceyan*Tournaisian
Gasconadian*Tremadocian
Lianghekouan*Tremadocian
Tremadoc*Tremadocian
Varanger*Varangian
Puruhuahuaun*Waiitian
Castile*Wuchiapingian
Djulfian*Wuchiapingian
Dzhulfian*Wuchiapingian
Longtanian*Wuchiapingian
Rustlerian*Wuchiapingian
Saladoan*Wuchiapingian
Wujiapingian*Wuchiapingian
Dacian*Zanclean
Tabianian*Zanclean
Zanclian*Zanclean