Palaeozoic Time Slices
Cambrian 1
Cambrian 1: early Cambrian (international stages of Fortunian through Stage 4) (about 542-511 million years)
Cambrian 2: Australian stage of Ordian (international stages of latest Stage 4 and early Stage 5) (about 511-509 million years)
Cambrian 3: Australian stage of Templetonian (international stages of middle and late Stage 5) (about 509-506 million years)
Cambrian 4: Australian stages of Floran and Undillan (international stages of early and middle Drumian) (about 506-504 million years)
Cambrian 5: Australian stages of Boomerangian and Mindyallian (international stages of late Drumian through Guzhangian) (about 504-499 million years)
Cambrian 6: Furongian Series (about 499-488 million years)
Ordovician 1: Early Ordovician (Tremadocian and Floian stages) (about 488-472 million years)
Ordovician 2: Dapingian (about 472-468 million years)
Ordovician 3: Darriwillian (about 468-461 million years)
Ordovician 4: Late Ordovician (Sandbian through Hirnantian stages) (about 461-444 million years)
Silurian 1: Llandovery series (about 444-428 million years)
Silurian 2: Wenlock and Ludlow series (about 428-419 million years)
Silurian 3: Pridoli series (about 419-416 million years)
Devonian 1: Lochkovian (about 416-411 million years)
Devonian 2: Pragian (about 411-407 million years)
Devonian 3: Emsian (about 407-398 million years)
Devonian 4: latest Emsian (about 398-398 million years)
Devonian 5: Eifelian through early Givetian (about 398-390 million years)
Devonian 6: middle and late Givetian (about 390-385 million years)
Devonian 7: early Frasnian (about 385-380 million years)
Devonian 8: late Frasnian (about 380-375 million years)
Devonian 9: early Famennian (about 375-365 million years)
Devonian 10: late Famennian (about 365-359 million years)
Carboniferous 1: early Tournaisian (about 359-350 million years)
Carboniferous 2: late Tournaisian through early Visean (about 350-341 million years)
Carboniferous 3: middle Visean (about 341-331 million years)
Carboniferous 4: late Visean (about 331-328 million years)
Carboniferous 5: Serpukhovian through early Bashkirian (about 328-315 million years)
Carboniferous 6: late Bashkirian through Moscovian (about 315-299 million years)
Permian 1: early Sakmarian (about 299-290 million years)
Permian 2: late Sakmarian (about 290-284 million years)
Permian 3: Artinskian (about 284-276 million years)
Permian 4: Kungurian through Wordian (about 276-266 million years)
Permian 5: early Capitanian (about 266-264 million years)
Permian 6: middle and late Capitanian (about 264-257 million years)
Permian 7: Lopingian Epoch (Wuchiapingian and Changhsingian) (about 257-251 million years)