PALEOZOIC ERA

DEVONIAN PERIOD

LATE DEVONIAN

FRASNIAN STAGE

FAMENNIAN STAGE

CARBONIFEROUS PERIOD

LOWER CARBONIFEROUS

MISSISSIPPIAN SUB PERIOD

TOURNAISIAN EPOCH

VISEAN EPOCH

SERPUKHOVIAN EPOCH

LATE CARBONIFEROUS

PENNSYLVANIAN SUB PERIOD

BASHKIRIAN EPOCH

MOSCOVIAN EPOCH

KASIMOVIAN EPOCH

GZELIAN EPOCH

PERMIAN PERIOD

In general

EARLY PERMIAN

ROTLIGENDES EPOCH

ASSELIAN STAGE

SAKMARIAN STAGE

ARTINSKIAN STAGE

KUNGURIAN STAGE

ZECHSTEIN EPOCH

GUADELUPIAN SUPEPOCH

UFIMIAN STAGE

WORDIAN STAGE

CAPITANIAN STAGE

WOLFCAMPANIAN STAGE

LOPINGIAN SUBEPOCH

LONGTANIAN STAGE

CHANGXINGIAN STAGE

KAZANIAN SUBSTAGE

LEONARDIAN STAGE

TATARIAN SUBSTAGE

LATE PERMIAN

MESOZOIC ERA

TRIASSIC PERIOD

LOWER TRIASSIC

In general

SCYTHIAN EPOCH (EARLY TRIASSIC)

INDUAN STAGE

GRIESBACHIAN STAGE

NAMMALIAN STAGE

SPATHIAN STAGE

MIDDLE TRIASSIC

MID TRIASSIC EPOCH

In general

ANISIAN STAGE

LADINIAN STAGE

LATE TRIASSIC

LATE TRIASSIC EPOCH

In general

CARNIAN STAGE

NORIAN STAGE

RHAETIAN STAGE

JURASSIC PERIOD

In general

EARLY JURASSIC

In general

LIAS EPOCH

HETTANGIAN STAGE

SINEMURIAN STAGE

PLIENSBACHIAN STAGE

TOARCIAN STAGE

MIDDLE JURASSIC

In general

DOGGER EPOCH

AALENIAN STAGE

BAJOCIAN STAGE

BATHONIAN STAGE

CALLOVIAN STAGE

LATE JURASSIC

In general

MALM EPOCH

OXFORDIAN STAGE

KIMMERIDGIAN STAGE

TITHONIAN STAGE

CRETACEOUS PERIOD

EARLY CRETACEOUS

EARLY CRETACEOUS EPOCH

In general

NEOCOMIAN SUBEPOCH

BERRIASIAN STAGE

VALANGINIAN STAGE

HAUTERIVIAN STAGE

GALLIC SUBEPOCH

BARREMIAN STAGE

APTIAN STAGE

GULF EPOCH

GALLIC SUBEPOCH

ALBIAN STAGE

MIDDLE CRETACEOUS

In general

CENOMANIAN STAGE

TURONIAN STAGE

LATE CRETACEOUS

In general

SENONIAN SUBEPOCH

CONIACIAN STAGE

SANTONIAN STAGE

CAMPANIAN STAGE

CAMPANIAN STAGE UNITED STATES

MAASTRICHTIAN STAGE

MAASTRICHTIAN STAGE UNITED STATES

CENOZOIC ERA

TERTIARY SUBERA

PALEOGENE PERIOD

PALEOCENE EPOCH

EOCENE EPOCH

OLIGOCENE EPOCH

NEOGENE PERIOD

MIOCENE EPOCH

PLIOCENE EPOCH

QUATERNARY SUBERA

PLEISTOCENE EPOCH

HOLOCENE EPOCH