Aalenian (171.6 - 175.6) 4 Myr Abereiddian (464 - 471.8) 7.8 Myr Acadian (501 - 513) 12 Myr Actonian (453 - 454) 1 Myr Adelaidean (542 - 1300) 758 Myr Aegean (243 - 245) 2 Myr Aeronian (436 - 439) 3 Myr Aksayan (491.5 - 493) 1.5 Myr Aktastinian (275.6 - 284.4) 8.8 Myr Alaunian (211 - 216) 5 Myr Albertan (501 - 513) 12 Myr Albian (99.6 - 112) 12.4 Myr Aldingian (33 - 36) 3 Myr Alexandrian (436 - 443.7) 7.7 Myr Alportian (318.1 - 324.5) 6.4 Myr Altonian (16.5 - 17.5) 1 Myr Amgan (502 - 513) 11 Myr Animikean (1400 - 2225) 825 Myr Anisian (237 - 245) 8 Myr Aphebian (1600 - 2500) 900 Myr Aptian (112 - 125) 13 Myr Aquitanian (20.43 - 23.03) 2.6 Myr Aratauran (188 - 199.6) 11.6 Myr Archean (2500 - 3800) 1300 Myr Archeozoic (2500 - 3800) 1300 Myr Arenig (471.8 - 478.6) 6.8 Myr Arenigian (471.8 - 478.6) 6.8 Myr Arikareean (19 - 30.5) 11.5 Myr Aritan (125 - 136.4) 11.4 Myr Arnsbergian (325 - 326) 1 Myr Arowhanan (93 - 95) 2 Myr Artinskian (275.6 - 284.4) 8.8 Myr Arundian (339 - 341) 2 Myr Asbian (333 - 337.5) 4.5 Myr Ashgill (443.7 - 449) 5.3 Myr Asselian (294.6 - 299) 4.4 Myr Astian (2.588 - 3.6) 1.012 Myr Atdabanian (524 - 530) 6 Myr Atokan/Derryan (308 - 311.7) 3.7 Myr Atokan (308 - 311.7) 3.7 Myr Aurelucian (457 - 460.9) 3.9 Myr Austinian (65.5 - 99.6) 34.1 Myr Auversian (37.2 - 40.4) 3.2 Myr Awamoan (17.5 - 20) 2.5 Myr Ayusokkanian (494.5 - 501) 6.5 Myr Azoic (3800 - 4567.17) 767.17 Myr Baigendzinian (275.6 - 284.4) 8.8 Myr Bairnsdalian (10.5 - 15) 4.5 Myr Baishaean (429 - 433) 4 Myr Bajocian (167.7 - 171.6) 3.9 Myr Bala (443.7 - 460.9) 17.2 Myr Balan (443.7 - 460.9) 17.2 Myr Balcombian (15 - 15.5) 0.5 Myr Bananian (219 - 228) 9 Myr Baotan (454.5 - 460.9) 6.4 Myr Barremian (125 - 130) 5 Myr Barstovian (11.8 - 15.5) 3.7 Myr Bartonian (37.2 - 40.4) 3.2 Myr Bashkirian (311.7 - 318.1) 6.4 Myr Basin Groups (3975 - 4150) 175 Myr Batesfordian (15.5 - 16.5) 1 Myr Bathonian (164.7 - 167.7) 3 Myr Batyrbayan (488.3 - 491.5) 3.2 Myr Begudian (68 - 70.6) 2.6 Myr Bendigonian (473 - 475) 2 Myr Berriasian (140.2 - 145.5) 5.3 Myr Bithynian (241 - 243) 2 Myr Black Riveran (459 - 460.9) 1.9 Myr Blackriveran (459 - 460.9) 1.9 Myr Blackriverian (459 - 460.9) 1.9 Myr Blancan (1.806 - 4.75) 2.944 Myr Bolindian (443.7 - 450) 6.3 Myr Bolsovian (306.5 - 311.7) 5.2 Myr Boomerangian (501 - 504) 3 Myr Bortonian (40 - 44) 4 Myr Botomian (518.5 - 524) 5.5 Myr Braxtonian (260.4 - 270.6) 10.2 Myr Bridgerian (45.4 - 50.5) 5.1 Myr Brigantian (326.4 - 336) 9.6 Myr Bulitian (53 - 55.8) 2.8 Myr Buntsandstein (245 - 251) 6 Myr Burdigalian (15.97 - 20.43) 4.46 Myr Burrellian (455 - 457) 2 Myr Burzyan (1375 - 1400) 25 Myr Caerfai (513 - 542) 29 Myr Calabrian (0.781 - 1.806) 1.025 Myr Callovian (161.2 - 164.7) 3.5 Myr Calymmian (1400 - 1600) 200 Myr Cambrian (488.3 - 542) 53.7 Myr Campanian (70.6 - 83.5) 12.9 Myr Canadaway (359.2 - 374.5) 15.3 Myr Canadian (471.8 - 488.3) 16.5 Myr Cantabrian (305 - 306.5) 1.5 Myr Capitanian (260.4 - 265.8) 5.4 Myr Caradoc (449 - 460.9) 11.9 Myr Caradocian (449 - 460.9) 11.9 Myr Carboniferous (299 - 359.2) 60.2 Myr Carnian (216.5 - 228) 11.5 Myr Carpentarian (1300 - 1800) 500 Myr Cassinian (471.8 - 473) 1.2 Myr Castile (253.8 - 260.4) 6.6 Myr Castlecliffian (0.01143 - 1.1) 1.0886 Myr Castlemanian (470 - 471) 1 Myr Cautleyan (446.5 - 447.5) 1 Myr Cayugan (416 - 421.3) 5.3 Myr Cazenovian (385.3 - 397.5) 12.2 Myr Cenomanian (93.5 - 99.6) 6.1 Myr Cenozoic (-5.5012e-005 - 65.5) 65.5001 Myr Chadian (341 - 345.3) 4.3 Myr Chadronian (33.5 - 37) 3.5 Myr Chamovnicheskian (305 - 306) 1 Myr Changhsingian (251 - 253.8) 2.8 Myr Changlangpuan (518 - 523) 5 Myr Changshanian (492.5 - 496.8) 4.3 Myr Changshingian (251 - 253.8) 2.8 Myr Changxingian (251 - 253.8) 2.8 Myr Charmouthian (183 - 189.6) 6.6 Myr Chatauquan (359.2 - 370) 10.8 Myr Chattian (23.03 - 28.4) 5.37 Myr Chazyan (460.9 - 464) 3.1 Myr Cheltenhamian (4.3 - 5) 0.7 Myr Cheneyan (452 - 455) 3 Myr Cheremshanskian (313.4 - 314.5) 1.1 Myr Chesterian (318.1 - 333) 14.9 Myr Chewtonian (471 - 473) 2 Myr Chickasawhayan (23.03 - 28.4) 5.37 Myr Chokerian (324.5 - 325) 0.5 Myr Chokierian (324.5 - 325) 0.5 Myr Chouteau (348 - 359.2) 11.2 Myr Cincinnatian (443.7 - 451) 7.3 Myr Cisuralian (270.6 - 299) 28.4 Myr Clairbornean (33.9 - 55.8) 21.9 Myr Clarendonian (9 - 11.8) 2.8 Myr Clarkforkian (55.5 - 56) 0.5 Myr Cliffdenian (15 - 16.5) 1.5 Myr Coahulian (127 - 145.5) 18.5 Myr Comanchean (99.6 - 127) 27.4 Myr Conewangan (359.2 - 374.5) 15.3 Myr Coniacian (85.8 - 89.3) 3.5 Myr Conneautan (359.2 - 374.5) 15.3 Myr Costonian (459 - 460.9) 1.9 Myr Courceyan (345.3 - 359.2) 13.9 Myr Cressagian (486 - 488.3) 2.3 Myr Cretaceous (65.5 - 145.5) 80 Myr Croixian (488.3 - 501) 12.7 Myr Cryogenian (630 - 850) 220 Myr Cryptic (4150 - 4567.17) 417.17 Myr Cryptozoic (542 - 4567.17) 4025.17 Myr Dacian (3.6 - 5.332) 1.732 Myr Dalanian (310 - 313) 3 Myr Danian (61.7 - 65.5) 3.8 Myr Darriwilian (460.9 - 468.1) 7.2 Myr Datangian (333 - 345) 12 Myr Datsonian (485 - 488.3) 3.3 Myr Dawanian (471.8 - 472) 0.2 Myr Deer Parkian (397.5 - 407) 9.5 Myr Delamaran (504 - 512) 8 Myr Delmontian (2.9 - 7.5) 4.6 Myr Demingian (475 - 478.6) 3.6 Myr Derryan (308 - 311.7) 3.7 Myr Desmoinesian (306.5 - 308) 1.5 Myr Desmoinian (306.5 - 308) 1.5 Myr Devonian (359.2 - 416) 56.8 Myr Dewey Lake (251 - 253.8) 2.8 Myr Dewuan (318.1 - 333) 14.9 Myr Dienerian (249.7 - 250.4) 0.7 Myr Dinantian (326.4 - 359.2) 32.8 Myr Djulfian (253.8 - 260.4) 6.6 Myr Dogger (161.2 - 175.6) 14.4 Myr Dolgellian (488.3 - 492.5) 4.2 Myr Dongganglingian (385.3 - 391.4) 6.1 Myr Dorashamian (251 - 253.8) 2.8 Myr Dorogomilovksian (303.9 - 305) 1.1 Myr Dresbachian (496.8 - 501) 4.2 Myr Dreussian (161.2 - 164.7) 3.5 Myr Duchesnean (37 - 40) 3 Myr Duckmantian (311.7 - 313.4) 1.7 Myr Duntroonian (27 - 28) 1 Myr Durango (99.6 - 145.5) 45.9 Myr Dyeran (512 - 524.5) 12.5 Myr Dyfed (460.9 - 471.8) 10.9 Myr Dzhulfian (253.8 - 260.4) 6.6 Myr Eagle Fordian (65.5 - 99.6) 34.1 Myr Early Cambrian (513 - 542) 29 Myr Early Carboniferous (318.1 - 359.2) 41.1 Myr Early Cretaceous (99.6 - 145.5) 45.9 Myr Early Devonian (397.5 - 416) 18.5 Myr Early Eocene (48.6 - 55.8) 7.2 Myr Early Imbrian (3800 - 3900) 100 Myr Early Jurassic (175.6 - 199.6) 24 Myr Early Miocene (15.97 - 23.03) 7.06 Myr Early Mississippian (345.3 - 359.2) 13.9 Myr Early Oligocene (28.4 - 33.9) 5.5 Myr Early Ordovician (471.8 - 488.3) 16.5 Myr Early Paleocene (61.7 - 65.5) 3.8 Myr Early Pennsylvanian (311.7 - 318.1) 6.4 Myr Early Permian (270.6 - 299) 28.4 Myr Early Pleistocene (0.781 - 1.806) 1.025 Myr Early Pliocene (3.6 - 5.332) 1.732 Myr Early Silurian (422.9 - 443.7) 20.8 Myr Early Triassic (245 - 251) 6 Myr Eastonian (450 - 456) 6 Myr Ectasian (1200 - 1400) 200 Myr Edenian (449 - 454) 5 Myr Ediacaran (542 - 630) 88 Myr Ediacarian (542 - 630) 88 Myr Eifelian (391.8 - 397.5) 5.7 Myr Eildonian (428.2 - 433) 4.8 Myr Ellesmerian (250.4 - 251) 0.6 Myr Elvirian (324.5 - 326) 1.5 Myr Emsian (397.5 - 407) 9.5 Myr Eoarchean (3600 - 3800) 200 Myr Eocene (33.9 - 55.8) 21.9 Myr Erian (388 - 391.8) 3.8 Myr Erqiaoan (199.6 - 209) 9.4 Myr Etalian (232 - 243) 11 Myr Falangian (228 - 237) 9 Myr Famennian (359.2 - 374.5) 15.3 Myr Fassanian (231.4 - 237) 5.6 Myr Feixianguanian (249.7 - 251) 1.3 Myr Fengshanian (488.3 - 492.5) 4.2 Myr Fennian (471.8 - 473.5) 1.7 Myr Festiniogian (492.5 - 496.8) 4.3 Myr Filippovian (270.6 - 275.6) 5 Myr Florian (506 - 508) 2 Myr Franconian (492.5 - 496.8) 4.3 Myr Frasnian (374.5 - 385.3) 10.8 Myr Frederiksbergian (99.6 - 112) 12.4 Myr Fronian (436 - 437.5) 1.5 Myr Fujian (9.5 - 11.1) 1.6 Myr Fupingan (2600 - 3100) 500 Myr Furongian (488.3 - 501) 12.7 Myr Fuvelian (70.6 - 77) 6.4 Myr Gallic (89.3 - 130) 40.7 Myr Gamachian (443.7 - 445.6) 1.9 Myr Gangetian (250.4 - 251) 0.6 Myr Gasconadian (478.6 - 488.3) 9.7 Myr Gasperian (326.4 - 336) 9.6 Myr Gault (99.6 - 112) 12.4 Myr Gedinnian (411.2 - 416) 4.8 Myr Gelasian (1.806 - 2.588) 0.782 Myr Geneseean (385.3 - 391.8) 6.5 Myr Geneyan (452 - 455) 3 Myr Georgian (513 - 542) 29 Myr Gisbornian (456 - 460.9) 4.9 Myr Givetian (385.3 - 391.8) 6.5 Myr Gleedonian (422.9 - 425.4) 2.5 Myr Gorstian (421.3 - 422.9) 1.6 Myr Griesbachian (250.4 - 251) 0.6 Myr Guadalupian (260.4 - 270.6) 10.2 Myr Guandian (422 - 425.5) 3.5 Myr Guanlingian (237 - 245) 8 Myr Gulfian (65.5 - 99.6) 34.1 Myr Guniutanian (464 - 471.8) 7.8 Myr Gushanian (496.8 - 501) 4.2 Myr Gyliakian (89.3 - 96.6) 7.3 Myr Gzelian (299 - 303.9) 4.9 Myr Gzhelian (299 - 303.9) 4.9 Myr Hadean (3800 - 4567.17) 767.17 Myr Hadrynian (542 - 850) 308 Myr Hallian (-5.5012e-005 - 0.01143) 0.011485 Myr Haranoyan (15.97 - 18.2) 2.23 Myr Harnagian (458 - 459) 1 Myr Hastarian (348 - 359.2) 11.2 Myr Haumurian (65.5 - 70.6) 5.1 Myr Hauterivian (130 - 136.4) 6.4 Myr Hawera (-5.5012e-005 - 0.01143) 0.011485 Myr Heersian (55.8 - 58.7) 2.9 Myr Helderbergian (397.5 - 416) 18.5 Myr Helikian (850 - 1600) 750 Myr Hemingfordian (15.5 - 19) 3.5 Myr Hemphillian (4.75 - 9) 4.25 Myr Heretaungan (47 - 50) 3 Myr Heterian (152 - 156) 4 Myr Hetonian (65.5 - 77.1) 11.6 Myr Hettangian (196.5 - 199.6) 3.1 Myr Hirnantian (443.7 - 445.6) 1.9 Myr Holkerian (337.5 - 339) 1.5 Myr Holocene (-5.5012e-005 - 0.01143) 0.011485 Myr Homerian (422.9 - 426.2) 3.3 Myr Honghuayuanian (472 - 478.6) 6.6 Myr Huashibanian (313 - 318.1) 5.1 Myr Huobachengian (209 - 219) 10 Myr Huronian (1400 - 2500) 1100 Myr Hutchinsonian (20 - 21) 1 Myr Ibexian (471.8 - 491) 19.2 Myr Idamean (494 - 497) 3 Myr Idwian (437.5 - 439) 1.5 Myr Illyrian (237 - 239) 2 Myr Induan (249.7 - 251) 1.3 Myr Ionian (0.126 - 0.781) 0.655 Myr Irenian (270.6 - 275.6) 5 Myr Irvingtonian (0.3 - 1.806) 1.506 Myr Isuan (3500 - 3800) 300 Myr Ivorean (345.3 - 348) 2.7 Myr Jacksonian (33.9 - 37.2) 3.3 Myr Janjukian (27.5 - 30) 2.5 Myr Jeffersonian (473 - 475) 2 Myr Jinningian (800 - 1750) 950 Myr Johannian (36 - 52) 16 Myr Julian (225 - 228) 3 Myr Jurassic (145.5 - 199.6) 54.1 Myr Kaburan (11.1 - 13.5) 2.4 Myr Kaihikuan (225 - 232) 7 Myr Kalimnan (3.4 - 4.3) 0.9 Myr Kapitean (4.8 - 6) 1.2 Myr Karatau (800 - 1100) 300 Myr Kashirskian (308 - 309.2) 1.2 Myr Kasimovian (303.9 - 306.5) 2.6 Myr Kazanian (260.4 - 270.6) 10.2 Myr Kechienjian (1.5 - 1.9) 0.4 Myr Keiloran (433 - 443.7) 10.7 Myr Keuper (199.6 - 228) 28.4 Myr Kiaitan (37.2 - 40) 2.8 Myr Kimmeridgian (150.8 - 155.7) 4.9 Myr Kinderhookian (348 - 359.2) 11.2 Myr Kinderscoutian (317 - 318.1) 1.1 Myr Kirkfield (457 - 458) 1 Myr Klazminskian (300.5 - 303.9) 3.4 Myr Kochian (136.4 - 145.5) 9.1 Myr Korangian (110 - 119) 9 Myr Krevyakinskian (306 - 306.5) 0.5 Myr Krumaian (294.6 - 299) 4.4 Myr Kungurian (270.6 - 275.6) 5 Myr Lacinian (216 - 216.5) 0.5 Myr Ladinian (228 - 237) 9 Myr Lancefieldian (475 - 482) 7 Myr Landenian (55.8 - 58.7) 2.9 Myr Langhian (13.65 - 15.97) 2.32 Myr Langsettian (313.4 - 314.5) 1.1 Myr Late Cambrian (488.3 - 501) 12.7 Myr Late Carboniferous (299 - 318.1) 19.1 Myr Late Cretaceous (65.5 - 99.6) 34.1 Myr Late Devonian (359.2 - 385.3) 26.1 Myr Late Eocene (33.9 - 37.2) 3.3 Myr Late Jurassic (145.5 - 161.2) 15.7 Myr Late Miocene (5.332 - 11.608) 6.276 Myr Late Mississippian (318.1 - 326.4) 8.3 Myr Late Oligocene (23.03 - 28.4) 5.37 Myr Late Ordovician (443.7 - 460.9) 17.2 Myr Late Paleocene (55.8 - 58.7) 2.9 Myr Late Pennsylvanian (299 - 306.5) 7.5 Myr Late Permian (251 - 260.4) 9.4 Myr Late Pleistocene (0.01143 - 0.126) 0.11457 Myr Late Pliocene (1.806 - 3.6) 1.794 Myr Late Silurian (416 - 422.9) 6.9 Myr Late Triassic (199.6 - 228) 28.4 Myr Latdorfian (28.4 - 33.9) 5.5 Myr Lenian (513 - 524) 11 Myr Leonardian (270.6 - 280) 9.4 Myr Lianghekouan (478.6 - 488.3) 9.7 Myr Lianhuashanian (413 - 416) 3 Myr Lias (175.6 - 199.6) 24 Myr Lillburnian (11.5 - 15) 3.5 Myr Linxiangian (449 - 454.5) 5.5 Myr Llandeilian (460.9 - 464) 3.1 Myr Llandeilo (460.9 - 464) 3.1 Myr Llandovery (428.2 - 443.7) 15.5 Myr Llanvirn (464 - 471.8) 7.8 Myr Llanvirnian (464 - 471.8) 7.8 Myr Lochkovian (411.2 - 416) 4.8 Myr Lockportian (422.9 - 426.2) 3.3 Myr Longfordian (16.5 - 27.5) 11 Myr Longmaxian (438 - 443.7) 5.7 Myr Longobardian (228 - 231.4) 3.4 Myr Longtanian (253.8 - 260.4) 6.6 Myr Longvillian (455 - 457) 2 Myr Longwangmioan (513 - 518) 5 Myr Lopingian (251 - 260.4) 9.4 Myr Lotharingian (189.6 - 193.3) 3.7 Myr Lower Cambrian (513 - 542) 29 Myr Lower Carboniferous (318.1 - 359.2) 41.1 Myr Lower Cretaceous (99.6 - 145.5) 45.9 Myr Lower Devonian (397.5 - 416) 18.5 Myr Lower Eocene (48.6 - 55.8) 7.2 Myr Lower Jurassic (175.6 - 199.6) 24 Myr Lower Miocene (15.97 - 23.03) 7.06 Myr Lower Mississipian (345.3 - 359.2) 13.9 Myr Lower Oligocene (28.4 - 33.9) 5.5 Myr Lower Ordovician (471.8 - 488.3) 16.5 Myr Lower Paleocene (61.7 - 65.5) 3.8 Myr Lower Pennsylvanian (311.7 - 318.1) 6.4 Myr Lower Permian (270.6 - 299) 28.4 Myr Lower Pleistocene (0.781 - 1.806) 1.025 Myr Lower Pliocene (3.6 - 5.332) 1.732 Myr Lower Silurian (422.9 - 443.7) 20.8 Myr Lower Triassic (245 - 251) 6 Myr Ludfordian (418.7 - 421.3) 2.6 Myr Ludlow (418.7 - 422.9) 4.2 Myr Luisian (13.5 - 15.5) 2 Myr Luliangian (1750 - 2350) 600 Myr Lutetian (40.4 - 48.6) 8.2 Myr Maastrichtian (65.5 - 70.6) 5.1 Myr Maentwrogian (496.8 - 501) 4.2 Myr Maestrichtian (65.5 - 70.6) 5.1 Myr Makabewan (251 - 253.8) 2.8 Myr Malakovian (243 - 248) 5 Myr Malm (145.5 - 161.2) 15.7 Myr Mangaorapan (50 - 52) 2 Myr Mangaotanean (87 - 93) 6 Myr Mangapanian (1.96 - 2.6) 0.64 Myr Mangapirian (270.6 - 278) 7.4 Myr Maokovian (260.4 - 270.6) 10.2 Myr Maozhangian (509 - 513) 4 Myr Mapingian (299 - 310) 11 Myr Marjuman (494.5 - 504) 9.5 Myr Marsdenian (315.5 - 317) 1.5 Myr Marshbrookian (454 - 455) 1 Myr Mayan (501 - 502) 1 Myr Mayvillian (447.5 - 453) 5.5 Myr Medinan (438 - 443.7) 5.7 Myr Meishuchuan (532 - 542) 10 Myr Melbournian (416 - 428.2) 12.2 Myr Melekesskian (311.7 - 313.4) 1.7 Myr Menevian (501 - 502) 1 Myr Meramecian (333 - 340) 7 Myr Merioneth (488.3 - 501) 12.7 Myr Mesoarchean (2800 - 3200) 400 Myr Mesoproterozoic (1000 - 1600) 600 Myr Mesozoic (65.5 - 251) 185.5 Myr Messinian (5.332 - 7.246) 1.914 Myr Miaogoalingian (418.7 - 422) 3.3 Myr Miaopoan (460.9 - 464) 3.1 Myr Middle Cambrian (501 - 513) 12 Myr Middle Devonian (385.3 - 397.5) 12.2 Myr Middle Eocene (37.2 - 48.6) 11.4 Myr Middle Jurassic (161.2 - 175.6) 14.4 Myr Middle Miocene (11.608 - 15.97) 4.362 Myr Middle Mississippian (326.4 - 345.3) 18.9 Myr Middle Ordovician (460.9 - 471.8) 10.9 Myr Middle Paleocene (58.7 - 61.7) 3 Myr Middle Pennsylvanian (306.5 - 311.7) 5.2 Myr Middle Permian (260.4 - 270.6) 10.2 Myr Middle Pleistocene (0.126 - 0.781) 0.655 Myr Middle Triassic (228 - 245) 17 Myr Midwayan (23.03 - 33.9) 10.87 Myr Migneintian (478.6 - 486) 7.4 Myr Mindyallan (497 - 501) 4 Myr Miocene (5.332 - 23.03) 17.698 Myr Mississippian (318.1 - 359.2) 41.1 Myr Missourian (305 - 306.5) 1.5 Myr Mitchellian (5 - 10.5) 5.5 Myr Miyakoan (96.6 - 125) 28.4 Myr Mohawkian (451 - 462) 11 Myr Mohnian (7.5 - 13.5) 6 Myr Mokoiwian (119 - 145.5) 26.5 Myr Mokolian (900 - 2050) 1150 Myr Montezuman (524.5 - 529.5) 5 Myr Montian (61.7 - 65.5) 3.8 Myr Moridunian (475 - 478.6) 3.6 Myr Morrisonian (145.5 - 161.2) 15.7 Myr Morrowan (311.7 - 318.1) 6.4 Myr Mortesnes (630 - 640) 10 Myr Moscovian (306.5 - 311.7) 5.2 Myr Motuan (99.6 - 104) 4.4 Myr Muschelkalk (228 - 245) 17 Myr Myachkovskian (306.5 - 307.2) 0.7 Myr Nagaolingian (410 - 413) 3 Myr Namibian (542 - 900) 358 Myr Nammalian (247.4 - 249.7) 2.3 Myr Namurian (315 - 326.4) 11.4 Myr Narizian (35 - 48) 13 Myr Navarroan (65.5 - 70.6) 5.1 Myr Nectarian (3900 - 3975) 75 Myr Nemakit-Daldynian (534 - 542) 8 Myr Neoarchean (2500 - 2800) 300 Myr Neocomian (130 - 145.5) 15.5 Myr Neogene (-5.5012e-005 - 23.03) 23.0301 Myr Neoproterozoic (542 - 1000) 458 Myr Neoproterozoic III (542 - 630) 88 Myr Ngaterian (95 - 99.6) 4.6 Myr Niagaran (421.3 - 438) 16.7 Myr Noginskian (299 - 300.5) 1.5 Myr Norian (203.6 - 216.5) 12.9 Myr Nuevo Leonian (89.3 - 130) 40.7 Myr Nukumaruan (1.1 - 1.96) 0.86 Myr Nullaginian (1800 - 2500) 700 Myr Ochoan (251 - 260.4) 9.4 Myr Ohauan (150 - 152) 2 Myr Okehuan (0.48 - 1.1) 0.62 Myr Olenekian (245 - 249.7) 4.7 Myr Oligocene (23.03 - 33.9) 10.87 Myr Onnian (449 - 453) 4 Myr Ontarian (428.2 - 436) 7.8 Myr Opoitian (3.6 - 4.8) 1.2 Myr Ordian (510 - 520) 10 Myr Ordovician II (471.8 - 478.6) 6.8 Myr Ordovician III (468.1 - 471.8) 3.7 Myr Ordovician V (455.8 - 460.9) 5.1 Myr Ordovician VI (445.6 - 455.8) 10.2 Myr Ordovician (443.7 - 488.3) 44.6 Myr Orellan (32 - 33.5) 1.5 Myr Oretian (218 - 225) 7 Myr Orosirian (1800 - 2050) 250 Myr Osagean (340 - 348) 8 Myr Otaian (21 - 23.03) 2.03 Myr Otamitan (206 - 218) 12 Myr Otapirian (199.6 - 203) 3.4 Myr Oxfordian (155.7 - 161.2) 5.5 Myr Paibian (496 - 501) 5 Myr Paleoarchean (3200 - 3600) 400 Myr Paleocene (55.8 - 65.5) 9.7 Myr Paleogene (23.03 - 65.5) 42.47 Myr Paleoproterozoic (1600 - 2500) 900 Myr Paleozoic (251 - 542) 291 Myr Payntonian (488.3 - 491) 2.7 Myr Pelsonian (239 - 241) 2 Myr Pendleian (326 - 326.4) 0.4 Myr Penglaizhenian (145.5 - 149) 3.5 Myr Pennsylvanian (299 - 318.1) 19.1 Myr Penutian (51 - 53) 2 Myr Permian (251 - 299) 48 Myr Phanerozoic (-5.5012e-005 - 542) 542.0001 Myr Piacenzian (2.588 - 3.6) 1.012 Myr Piripauan (70.6 - 83.5) 12.9 Myr Pleistocene (0.01143 - 1.806) 1.7946 Myr Pleistogene (-5.5012e-005 - 1.806) 1.8061 Myr Pliensbachian (183 - 189.6) 6.6 Myr Pliocene (1.806 - 5.332) 3.526 Myr Podolskian (307.2 - 308) 0.8 Myr Porangan (44 - 47) 3 Myr Portlandian (142 - 146) 4 Myr Potsdamian (488.3 - 501) 12.7 Myr Poundian (542 - 570) 28 Myr Praghian (407 - 411.2) 4.2 Myr Precambrian (542 - 4567.17) 4025.17 Myr Priabonian (33.9 - 37.2) 3.3 Myr Pridoli (416 - 418.7) 2.7 Myr Primary (251 - 542) 291 Myr Primordial (542 - 4567.17) 4025.17 Myr Priscoan (3800 - 4567.17) 767.17 Myr Proterozoic (542 - 2500) 1958 Myr Puaroan (145.5 - 150) 4.5 Myr Puercan (62.5 - 65.5) 3 Myr Puruhuahuaun (253.8 - 260.4) 6.6 Myr Pusgillian (447.5 - 449) 1.5 Myr Putikian (0.01143 - 0.48) 0.46857 Myr Qianxin (3400 - 3800) 400 Myr Quaternary (-5.5012e-005 - 1.806) 1.8061 Myr Qungzusian (523 - 532) 9 Myr Rancholabrean (0.01143 - 0.3) 0.28857 Myr Randian (2500 - 3000) 500 Myr Rawtheyan (445.6 - 446.5) 0.9 Myr Recent (-5.5012e-005 - 0.01143) 0.011485 Myr Redonian (2.588 - 3.6) 1.012 Myr Refugian (33.5 - 35) 1.5 Myr Relizian (15.5 - 16.5) 1 Myr Repettian (2.2 - 2.9) 0.7 Myr Rhaetian (199.6 - 203.6) 4 Myr Rhuddanian (439 - 443.7) 4.7 Myr Rhyacian (2050 - 2300) 250 Myr Richmondian (445.6 - 449) 3.4 Myr Riphean (800 - 1400) 600 Myr Roadian (268 - 270.6) 2.6 Myr Rocklandian (458 - 459) 1 Myr Rognacian (65.5 - 68) 2.5 Myr Romanian (2.588 - 3.6) 1.012 Myr Rotliegendes (270.6 - 299) 28.4 Myr Runangan (33.9 - 37.2) 3.3 Myr Rupelian (28.4 - 33.9) 5.5 Myr Rustlerian (253.8 - 260.4) 6.6 Myr Ryzanian (136.5 - 142) 5.5 Myr Saint David's (501 - 513) 12 Myr Saint Geneviere (326.4 - 336) 9.6 Myr Sakian (493 - 494.5) 1.5 Myr Sakmarian (284.4 - 294.6) 10.2 Myr Saladoan (253.8 - 260.4) 6.6 Myr Salem (337.5 - 339) 1.5 Myr Santonian (83.5 - 85.8) 2.3 Myr Saucesian (16.5 - 22) 5.5 Myr Sawkillian (397.5 - 407) 9.5 Myr Scythian (245 - 251) 6 Myr Secondary (65.5 - 251) 185.5 Myr Selandian (58.7 - 61.7) 3 Myr Senecan (370 - 388) 18 Myr Senonian (65.5 - 89.3) 23.8 Myr Serpukhovian (318.1 - 326.4) 8.3 Myr Serravallian (11.608 - 13.65) 2.042 Myr Sevatian (203.6 - 211) 7.4 Myr Shaodongian (349.5 - 359.2) 9.7 Myr Shaximioan (161.2 - 167) 5.8 Myr Sheinwoodian (426.2 - 428.2) 2 Myr Shermanian (454 - 457) 3 Myr Shetianqiaoan (374.5 - 385.3) 10.8 Myr Shinulanian (433 - 438) 5 Myr Sicilian (0.26 - 0.781) 0.521 Myr Siderian (2300 - 2500) 200 Myr Siegenian (407 - 411.2) 4.2 Myr Silesian (299 - 326.4) 27.4 Myr Silurian (416 - 443.7) 27.7 Myr Sinemurian (189.6 - 196.5) 6.9 Myr Sinian (542 - 800) 258 Myr Sipaian (397.5 - 407) 9.5 Myr Smalfjord (640 - 650) 10 Myr Smithian (247.4 - 249.7) 2.3 Myr Solvan (502 - 513) 11 Myr Sonyean (374.5 - 385.3) 10.8 Myr Soudleyan (457 - 458) 1 Myr Southwoodian (391.8 - 397.5) 5.7 Myr Spathian (245 - 247.4) 2.4 Myr St. David's (501 - 513) 12 Myr St. Geneviere (326.4 - 336) 9.6 Myr Stampian (28.4 - 33.9) 5.5 Myr Statherian (1600 - 1800) 200 Myr Stenian (1000 - 1200) 200 Myr Stephanian (299 - 306.5) 7.5 Myr Steptoan (493 - 494.5) 1.5 Myr Sterlitamakian (284.4 - 294.6) 10.2 Myr Streffordian (449 - 452) 3 Myr Sturtian (650 - 800) 150 Myr Suchian (1.9 - 3) 1.1 Myr Suiningian (149 - 161.2) 12.2 Myr Sunwaptan (491 - 493) 2 Myr Surenian (294.6 - 299) 4.4 Myr Swazian (3000 - 4000) 1000 Myr Tabianian (3.6 - 5.332) 1.732 Myr Taghanican (385.3 - 391.8) 6.5 Myr Tarantian (0.01143 - 0.126) 0.11457 Myr Tastubian (284.4 - 294.6) 10.2 Myr Tatarian (251 - 260.4) 9.4 Myr Taylorian (70.6 - 83.5) 12.9 Myr Telfordian (278 - 289) 11 Myr Telychian (428.2 - 436) 7.8 Myr Temaikan (161.2 - 169) 7.8 Myr Templetonian (508 - 510) 2 Myr Teratan (83.5 - 87) 3.5 Myr Tertiary (1.806 - 65.5) 63.694 Myr Teurian (56.5 - 65.5) 9 Myr Thanetian (55.8 - 58.7) 2.9 Myr Thuringian (251 - 270.6) 19.6 Myr Tiffanian (56 - 60.5) 4.5 Myr Tioughniogan (385.3 - 391.8) 6.5 Myr Tithonian (145.5 - 150.8) 5.3 Myr Toarcian (175.6 - 183) 7.4 Myr Tommotian (530 - 534) 4 Myr Tonawandian (426.2 - 428.2) 2 Myr Tongaporutuan (6 - 10) 4 Myr Tongrian (28.4 - 33.9) 5.5 Myr Tonian (850 - 1000) 150 Myr Torrejonian (60.5 - 62.5) 2 Myr Tortonian (7.246 - 11.608) 4.362 Myr Totomian (3 - 3.6) 0.6 Myr Tournaisian (345.3 - 359.2) 13.9 Myr Toyonian (513 - 518.5) 5.5 Myr Tozawan (13.5 - 15.97) 2.47 Myr Tremadoc (478.6 - 488.3) 9.7 Myr Tremadocian (478.6 - 488.3) 9.7 Myr Trempealeauan (488.3 - 492.5) 4.2 Myr Trentonian (449 - 460.9) 11.9 Myr Triassic (199.6 - 251) 51.4 Myr Trinitian (89.3 - 130) 40.7 Myr Turonian (89.3 - 93.5) 4.2 Myr Tuvalian (216.5 - 225) 8.5 Myr Tyrrhenian (0.01143 - 0.26) 0.24857 Myr Ufimian (268 - 270.6) 2.6 Myr Uintan (40 - 45.4) 5.4 Myr Ulatisian (48 - 51) 3 Myr Ulsterian (391.8 - 416) 24.2 Myr Undillian (504 - 506) 2 Myr Upper Cambrian (488.3 - 501) 12.7 Myr Upper Carboniferous (299 - 318.1) 19.1 Myr Upper Cretaceous (65.5 - 99.6) 34.1 Myr Upper Devonian (359.2 - 385.3) 26.1 Myr Upper Eocene (33.9 - 37.2) 3.3 Myr Upper Jurassic (145.5 - 161.2) 15.7 Myr Upper Miocene (5.332 - 11.608) 6.276 Myr Upper Mississippian (318.1 - 326.4) 8.3 Myr Upper Oligocene (23.03 - 28.4) 5.37 Myr Upper Ordovician (443.7 - 460.9) 17.2 Myr Upper Paleocene (55.8 - 58.7) 2.9 Myr Upper Pennsylvanian (299 - 306.5) 7.5 Myr Upper Permian (251 - 260.4) 9.4 Myr Upper Pleistocene (0.01143 - 0.126) 0.11457 Myr Upper Pliocene (1.806 - 3.6) 1.794 Myr Upper Silurian (416 - 422.9) 6.9 Myr Upper Triassic (199.6 - 228) 28.4 Myr Urakawan (77.1 - 89.3) 12.2 Myr Urgonian (112 - 125) 13 Myr Uruoan (169 - 188) 19 Myr Urutawan (104 - 110) 6 Myr Uskalikian (294.6 - 299) 4.4 Myr Vaalian (2050 - 2500) 450 Myr Valanginian (136.4 - 140.2) 3.8 Myr Valdonnian (77 - 83.5) 6.5 Myr Varanger (630 - 650) 20 Myr Varangian (630 - 650) 20 Myr Vendian (542 - 650) 108 Myr Venturian (1.9 - 2.2) 0.3 Myr Vereiskian (309.2 - 311.7) 2.5 Myr Vicksburgian (28.4 - 33.9) 5.5 Myr Virgilian (299 - 305) 6 Myr Visean (326.4 - 345.3) 18.9 Myr Volgian (142 - 150.8) 8.8 Myr Waiauan (10 - 11.5) 1.5 Myr Waiitian (253.8 - 260.4) 6.6 Myr Waipawan (52 - 56.5) 4.5 Myr Waipipian (2.6 - 3.6) 1 Myr Waitakian (23.03 - 27) 3.97 Myr Waltonian (1.806 - 2.588) 0.782 Myr Wangerripian (52 - 61.7) 9.7 Myr Warendian/Lancefieldian (475 - 485) 10 Myr Warendian (478.6 - 485) 6.4 Myr Warepan (203 - 206) 3 Myr Warsaw (339 - 341) 2 Myr Wasatchian (50.5 - 55.5) 5 Myr Waucoban (513 - 542) 29 Myr Wenlock (422.9 - 428.2) 5.3 Myr Werrikooian (1 - 1.806) 0.806 Myr West Fallsian (374.5 - 385.3) 10.8 Myr Westphalian (306.5 - 315) 8.5 Myr Whaingaroan (28 - 33.9) 5.9 Myr Wheelerian (0.01143 - 1.9) 1.8886 Myr White Rockian (462 - 471.8) 9.8 Myr Whitlandian (473.5 - 475) 1.5 Myr Whitneyan (30.5 - 32) 1.5 Myr Whitwellian (425.4 - 426.2) 0.8 Myr Wolfcampian (280 - 299) 19 Myr Wonokan (570 - 630) 60 Myr Woodbinian (93.5 - 99.6) 6.1 Myr Wordian (265.8 - 268) 2.2 Myr Wuchiapingian (253.8 - 260.4) 6.6 Myr Wufengian (443.7 - 449) 5.3 Myr Wujiapingian (253.8 - 260.4) 6.6 Myr Wutaian (2350 - 2600) 250 Myr Xikuangshanian (359.2 - 374.5) 15.3 Myr Xintiangouan (167 - 175.6) 8.6 Myr Xiushanian (425.5 - 429) 3.5 Myr Xixianian (270.6 - 299) 28.4 Myr Yanguan (345 - 349.5) 4.5 Myr Yatalan (2 - 3.4) 1.4 Myr Yeadonian (314.5 - 315.5) 1 Myr Yingtangian (391.4 - 397.5) 6.1 Myr Ynezian (55.8 - 61.5) 5.7 Myr Yongningzhenian (245 - 249.7) 4.7 Myr Ypeenian (468.1 - 470) 1.9 Myr Ypresian (48.6 - 55.8) 7.2 Myr Yuian (3.6 - 9.5) 5.9 Myr Yujianian (407 - 410) 3 Myr Yulongsian (416 - 418.7) 2.7 Myr Yurmatian (1100 - 1375) 275 Myr Yuzanjian (0.75 - 1.5) 0.75 Myr Zanclean (3.6 - 5.332) 1.732 Myr Zanclian (3.6 - 5.332) 1.732 Myr Zechstein (251 - 260.4) 9.4 Myr Zemorrian (22 - 33.5) 11.5 Myr Zhungxian (501 - 505) 4 Myr Ziliujingian (175.6 - 199.6) 24 Myr Zuzhuangian (505 - 509) 4 Myr 748 Stages Displayed