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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
 


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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.