North American Regional
17International timescale
Cenozoic
Quaternary
Holocene
Pleistocene
Neogene
Pliocene
Miocene
Paleogene
Oligocene
Eocene
Paleocene
Mesozoic
Cretaceous
Late Cretaceous
Early Cretaceous
Jurassic
Late Jurassic
Middle Jurassic
Early Jurassic
Triassic
Late Triassic
Middle Triassic
Early Triassic
Paleozoic
Permian
Lopingian
Guadalupian
Cisuralian
Carboniferous
Pennsylvanian
Mississippian
Devonian
Late Devonian
Middle Devonian
Early Devonian
Silurian
Pridoli
Ludlow
Wenlock
Llandovery
Ordovician
Late Ordovician
Middle Ordovician
Early Ordovician
Cambrian
Furongian
Miaolingian
Series 2
Terreneuvian
Neoproterozoic
Ediacaran
Cryogenian
Tonian
North American Regional
Rancholabrean
Irvingtonian
Blancan
Hemphillian
Clarendonian
Hemingfordian
Arikareean
Whitneyan
Orellan
Chadronian
Duchesnean
Uintan
Bridgerian
Wasatchian
Clarkforkian
Tiffanian
Torrejonian
Puercan
Maastrichtian
Campanian
Santonian
Coniacian
Turonian
Cenomanian
Albian
Aptian
Hauterivian
Valanginian
Berriasian
Tithonian
Kimmeridgian
Oxfordian
Callovian
Bathonian
Bajocian
Aalenian
Toarcian
Pliensbachian
Sinemurian
Hettangian
Rhaetian
Sevatian
Alaunian
Lacian
Tuvalian
Julian
Ladinian
Anisian
Spathian
Smithian
Dienerian
Griesbachian
Ochoan
Capitanian
Wordian
Roadian
Leonardian
Wolfcampian
Virgilian
Missourian
Desmoinesian
Atokan
Morrowan
Chesterian
Meramecian
Osagean
Kinderhookian
Chatauquan
Senecan
Erian
Ulsterian
Cayugan
Niagaran
Alexandrian
Gamachian
Richmondian
Maysvillian
Edenian
Mohawkian
Whiterock
Blackhillsian
Tulean
Stairsian
Skullrockian
Sunwaptan
Steptoean
Marjuman
Topazan
Delamaran
Dyeran
Montezuman
Begadean
Hadrynian
Age
RancholabreanIrvingtonianBlancanHemphillianClarendonianBarstovianHemingfordianArikareeanWhitneyanOrellanChadronianDuchesneanUintanBridgerianWasatchianClarkforkianTiffanianTorrejonianPuercanMaastrichtianCampanianSantonianConiacianTuronianCenomanianAlbianAptianBarremianHauterivianValanginianBerriasianTithonianKimmeridgianOxfordianCallovianBathonianBajocianAalenianToarcianPliensbachianSinemurianHettangianRhaetianLadinianAnisianSmithianDienerianOchoanCapitanianWordianRoadianLeonardianWolfcampianVirgilianMissourianDesmoinesianAtokanMorrowanChesterianMeramecianOsageanKinderhookianChatauquanSenecanErianUlsterianCayuganNiagaranAlexandrianGamachianRichmondianMaysvillianEdenianMohawkianWhiterockBlackhillsianTuleanStairsianSkullrockianSunwaptanSteptoeanMarjumanDelamaranDyeranMontezumanBegadean
