User:ThaddeusB/Geological periods


 * Carboniferous = 359 to 299 Ma
 * Cambrian = 542 to 488 Ma
 * Devonian = 416 to 359 Ma
 * Jurassic = 199 to 145 Ma
 * Cretaceous = 145 to 99 Ma
 * Ordovician = 488 to 443 Ma
 * Permian = 299 to 251 Ma
 * Silurian = 443 to 416 Ma
 * Triassic = 251 to 199 Ma
 * Vendian = 650 to 540 Ma
 * Bashkirian = 318 to 312 Ma
 * Serpukhovian = 328 to 318 Ma
 * Tournaisian = 359 to 345 Ma
 * Atdabanian = 521 to 517 Ma
 * Dresbachian = 501 to 497 Ma
 * Toyonian = 518 to 513 Ma
 * Trempealeauan = 501 to 490 Ma
 * Emsian = 407 to 398 Ma
 * Frasnian = 385 to 375 Ma
 * Givetian = 386 to 392 Ma
 * Bajocian = 171 to 167 Ma
 * Callovian = 164 to 161 Ma
 * Kimmeridgian = 155 to 150 Ma
 * Pliensbachian = 189 to 183 Ma
 * Tithonian = 150 to 145 Ma
 * Albian = 112 to 99 Ma
 * Barremian = 130 to 125 Ma
 * Campanian = 83 to 70 Ma
 * Coniacian = 89 to 85 Ma
 * Maastrichtian = 70 to 65 Ma
 * Turonian = 93 to 89 Ma
 * Arenig = 478 to 471 Ma
 * Caradoc = 460 to 449 Ma
 * Llanvirn = 471 to 464 Ma
 * Asselian = 299 to 294 Ma
 * Leonardian = 280 to 270 Ma
 * Pleistocene = 2.5 to .01 Ma
 * Ludlovian = 422 to 418 Ma
 * Wenlockian = 428 to 422 Ma
 * Eocene = 55 to 33 Ma
 * Miocene = 23 to 5 Ma
 * Pliocene = 5 to 2.5 Ma
 * Anisian = 245 to 237 Ma
 * Induan = 251 to 249 Ma
 * Norian = 216 to 203 Ma
 * Nemakit-Daldynian = 542 to 534 Ma
 * Moscovian = 311 to 306 Ma
 * Stephanian = 306 to 299 Ma
 * Visean = 345 to 326 Ma
 * Botomian = 524 to 518 Ma
 * Franconian = 497 to 492 Ma
 * Tommotian = 534 to 530 Ma
 * Eifelian = 397 to 391 Ma
 * Famennian = 374 to 359 Ma
 * Gedinnian = 408 to 396 Ma
 * Siegenian = 411 to 407 Ma
 * Bathonian = 167 to 164 Ma
 * Hettangian = 199 to 196 Ma
 * Oxfordian = 161 to 155 Ma
 * Sinemurian = 196 to 189 Ma
 * Toarcian = 183 to 175 Ma
 * Aptian = 125 to 112 Ma
 * Berriasian = 145 to 140 Ma
 * Cenomanian = 99 to 93 Ma
 * Hauterivian = 136 to 130 Ma
 * Santonian = 85 to 83 Ma
 * Valanginian = 140 to 136 Ma
 * Ashgill = 449 to 443 Ma
 * Llandeilo = 464 to 460 Ma
 * Tremadoc = 488 to 478 Ma
 * Guadelupian = 271 to 260 Ma
 * Sakmarian = 294 to 284 Ma
 * Llandovery = 443 to 428 Ma
 * Pridolian = 418 to 416 Ma
 * Danian = 65 to 61 Ma
 * Oligocene = 33 to 23 Ma
 * Thantian = 58 to 55 Ma
 * Carnian = 228 to 216 Ma
 * Ladinian = 237 to 228 Ma
 * Olenekian = 249 to 245 Ma
 * Aalenian = 175 to 171 Ma
 * Dorashamian = 255 to 251 Ma (if it's the same as the Changhsingian stage, which I'm pretty sure it is)
 * Senonian = 89 to 65 Ma
 * Djultian = 260 to 255 Ma (apparently the same as Longtanian)
 * Neocomian = 145 to 130 Ma
 * Paleocene = 65 to 55 Ma
 * Tatarian = 265 to 251 Ma
 * Rhaetian = 203 to 199 Ma
 * Nammalian = 251 to 245 Ma
 * Mississippian = 359 to 318 Ma
 * Neogene = 23 to 2 Ma
 * Paleogene = 65 to 23 Ma
 * Pennsylvanian = 318 to 299 Ma
 * Wuchiapingian = 260 to 253 Ma