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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z   

A

   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
[Top]

B 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 [Top]

C 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 [Top]

D 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 [Top]

E 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 [Top]

F 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 [Top]

G 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 [Top]

H 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 [Top]

I 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 [Top]

J 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 [Top]

K 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 [Top]

L 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 [Top]

M 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 [Top]

N 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 [Top]

O 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 [Top]

P 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 [Top]

Q Qianxin (3400 - 3800) 400 Myr Quaternary (-5.5012e-005 - 1.806) 1.8061 Myr Qungzusian (523 - 532) 9 Myr [Top]

R 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 [Top]

S 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 [Top]

T 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 [Top]

U 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 [Top]

V 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 [Top]

W 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 [Top]

X 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 [Top]

Y 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 [Top]

Z 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 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

This page was automatically generated from the GeoWhen database (version 1.1.0).  Please read the introduction regarding the accuracy and reliability of this information.  Comments, corrections, and additions can be sent to geowhen@robertrohde.com.  References to published academic literature are preferred.

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2003-2005 GeoWhen Database
Prepared By Robert A. Rohde


This page was last updated on Tuesday, January 18, 2005.