Knowledge (XXG)

Hettangian

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1954: 1943: 961:
Hillebrandt, A.v.; Krystyn, L.; Kürschner, W.M.; Bonis, N.R.; Ruhl, M.; Richoz, S.; Schobben, M. A. N.; Urlichs, M.; Bown, P.R.; Kment, K.; McRoberts, C.A.; Simms, M.; Tomãsových, A (September 2013). "The Global Stratotype Sections and Point (GSSP) for the base of the Jurassic System at Kuhjoch
1323: 1123:
Notices géologiques et paléontologiques sur les Alpes Vaudoises, et les régions environnantes. I. Infralias et Zone à Avicula contorta (Étage Rhaetien) des Alpes Vaudoises
1316: 1181: 510: 460: 445: 1048: 1309: 919: 1153: 1174: 1079: 1332: 499: 1110: 597: 677: 1987: 1167: 1147: 587: 1982: 1605: 1600: 769: 971: 562: 818: 814: 734: 853:. The top of the Hettangian Stage (the base of the Sinemurian) is at the first appearances of ammonite 727: 544: 976: 1977: 1936: 846: 838: 1142: 738: 1953: 1117: 944: 787: 1734: 1698: 1275: 1044: 392: 842: 1828: 1703: 1672: 1469: 1012: 981: 768:, which has an upper Rhaetian to Sinemurian age. Another example is the lower Lias from the 659: 321: 1797: 1693: 1631: 1526: 1495: 1464: 1208: 1083: 1017: 985: 803: 791: 303: 1947: 1766: 1636: 1531: 1500: 1203: 1001:"Global Stratotype Section and Point for base of the Sinemurian Stage (Lower Jurassic)" 671: 294: 1971: 1667: 1657: 1626: 1589: 1521: 1490: 1233: 1213: 1000: 864: 723: 663: 534: 350: 312: 285: 61: 1958: 1942: 1889: 1739: 1662: 1280: 890: 881: 399: 1156:, at the website of Norges Network of offshore records of geology and stratigraphy 1884: 1753: 1729: 1574: 1369: 760:
In European stratigraphy the Hettangian is a part of the time span in which the
36: 813:
The base of the Hettangian Stage (which is also the base of the Lower Jurassic
1879: 1839: 1782: 1682: 1579: 1453: 1353: 1301: 1228: 1150:, at the website of the subcommission for stratigraphic information of the ICS 1076: 906: 858: 829: 799: 761: 754: 648: 642: 570: 413: 343: 276: 81: 46: 692: 679: 612: 599: 1894: 1844: 1818: 1777: 1724: 1569: 1545: 1426: 1416: 1405: 1285: 1264: 1259: 898: 774: 765: 583: 406: 385: 378: 86: 821:) is defined as the place in the stratigraphic column where fossils of the 786:
The Hettangian was introduced in the literature by Swiss palaeontologist,
1854: 1849: 1813: 1713: 1646: 1615: 1510: 1479: 1440: 1390: 1364: 1340: 1254: 1249: 1238: 1190: 822: 750: 746: 731: 566: 371: 364: 357: 329: 266: 254: 244: 76: 71: 56: 51: 41: 1868: 1808: 1558: 1395: 1379: 877: 850: 667: 591: 91: 66: 1904: 1787: 1421: 795: 745:
and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the
1159: 962:(Karwendel Mountains, Northern Calcareous Alps, Tyrol, Austria)". 854: 825: 742: 1928: 1924: 1920: 834: 807: 30: 1305: 1163: 114: 1043:. Edinburgh, Scotland: Dorling Kindersley. pp. 44–45. 1125:
Bulletin de la Société Vaudoise des Sciences Naturelles
772:
where well-preserved but very rare ammonites, including
837:) for the base was defined 2010 for an exposure of the 1903: 1867: 1827: 1796: 1765: 1752: 1712: 1681: 1645: 1614: 1588: 1557: 1544: 1509: 1478: 1452: 1439: 1404: 1378: 1352: 1339: 708: 655: 636: 628: 578: 558: 550: 540: 530: 525: 517: 505: 495: 490: 482: 477: 107: 21: 1063:For a detailed geologic timescale, see Gradstein 1317: 1175: 459:Subdivision of the Jurassic according to the 8: 1099:Gradstein, F.M.; Ogg, J.G. & Smith, A.G. 833:first appear. A global reference profile (a 950:. International Commission on Stratigraphy. 466:Vertical axis scale: millions of years ago. 1762: 1554: 1449: 1349: 1324: 1310: 1302: 1199: 1182: 1168: 1160: 1154:Stratigraphic chart of the Lower Jurassic 1016: 975: 945:"International Chronostratigraphic Chart" 790:, in 1864. The stage takes its name from 764:was deposited. An example is the British 741:. It spans the time between 201.3 ± 0.2 999:Bloos, Gert; Page, Kevin (March 2002). 936: 876:The Hettangian contains three ammonite 18: 7: 435: 1923:= kiloannum (thousands years ago); 1927:= megaannum (millions years ago); 920:Triassic-Jurassic extinction event 446:Triassic–Jurassic extinction event 14: 1931:= gigaannum (billions years ago). 1952: 1941: 798:, just south of the border with 1018:10.18814/epiiugs/2002/v25i1/003 986:10.18814/epiiugs/2013/v36i3/001 753:Period) and is followed by the 16:First age of the Early Jurassic 1: 1370:Pleistocene (11.7 ka–2.58 Ma) 1143:GeoWhen Database - Hettangian 1333:Geological history of Earth 1039:Benton, Michael J. (2012). 571:Psiloceras spelae tirolicum 2004: 1606:Mississippian (323–359 Ma) 1601:Pennsylvanian (299–323 Ma) 1365:Holocene (present–11.7 ka) 1111:Cambridge University Press 1107:A Geologic Time Scale 2004 794:, a town in north-eastern 29:201.4 ± 0.2 – 199.5 ± 0.3 1918: 1890:Paleoarchean (3.2–3.6 Ga) 1740:Terreneuvian (521–539 Ma) 1197: 782:Stratigraphic definitions 637:Upper boundary definition 559:Lower boundary definition 456: 112: 26: 1885:Mesoarchean (2.8–3.2 Ga) 1730:Miaolingian (497–509 Ma) 1575:Guadalupian (260–272 Ma) 1427:Paleocene (56.0–66.0 Ma) 1417:Oligocene (23.0–33.9 Ma) 1148:Lower Jurassic timescale 817:and the entire Jurassic 588:Northern Calcareous Alps 1880:Neoarchean (2.5–2.8 Ga) 1845:Orosirian (1.8–2.05 Ga) 1840:Statherian (1.6–1.8 Ga) 1783:Cryogenian (635–720 Ma) 1673:Llandovery (433–444 Ma) 1580:Cisuralian (272–299 Ma) 1391:Pliocene (2.59–5.33 Ma) 770:Northern Limestone Alps 230:−145 — 220:−150 — 210:−155 — 200:−160 — 190:−165 — 180:−170 — 170:−175 — 160:−180 — 150:−185 — 140:−190 — 130:−195 — 120:−200 — 1850:Rhyacian (2.05–2.3 Ga) 1819:Calymmian (1.4–1.6 Ga) 1778:Ediacaran (539–635 Ma) 1725:Furongian (485–497 Ma) 1570:Lopingian (252–260 Ma) 1396:Miocene (5.33–23.0 Ma) 802:on the main road from 643:Vermiceras quantoxense 640:FAD of the Ammonites 1855:Siderian (2.3–2.5 Ga) 1814:Ectasian (1.2–1.4 Ga) 1735:Series 2 (509–521 Ma) 1422:Eocene (33.9–56.0 Ma) 891:Schlotheimia angulata 1895:Eoarchean (3.6–4 Ga) 1788:Tonian (720 Ma–1 Ga) 1668:Wenlock (427–433 Ma) 1658:Pridoli (419–423 Ma) 1204:Lower/Early Jurassic 907:Psiloceras planorbis 1950: • 1939: • 1937:Geologic time scale 1699:Middle (458–470 Ma) 1663:Ludlow (423–427 Ma) 1632:Middle (383–393 Ma) 1527:Middle (237–247 Ma) 1496:Middle (164–174 Ma) 1214:Upper/Late Jurassic 847:Karwendel Mountains 839:Kendlbach Formation 778:, have been found. 709:Upper GSSP ratified 689: /  656:Upper boundary GSSP 629:Lower GSSP ratified 613:47.4839°N 11.5306°E 609: /  584:Karwendel mountains 579:Lower boundary GSSP 551:Time span formality 1948:Geology portal 1809:Stenian (1–1.2 Ga) 1704:Early (470–485 Ma) 1637:Early (393–419 Ma) 1532:Early (247–252 Ma) 1501:Early (174–201 Ma) 1470:Early (100–145 Ma) 1465:Late (66.0–100 Ma) 1082:2012-11-15 at the 899:Alsatites liasicus 739:geologic timescale 693:51.1909°N 3.2364°W 649:Vermiceras palmeri 541:Stratigraphic unit 531:Chronological unit 518:Time scale(s) used 1965: 1964: 1863: 1862: 1829:Paleoproterozoic 1748: 1747: 1694:Late (444–458 Ma) 1627:Late (359–383 Ma) 1540: 1539: 1522:Late (201–237 Ma) 1491:Late (145–164 Ma) 1435: 1434: 1356:(present–2.58 Ma) 1344:(present–66.0 Ma) 1299: 1298: 1294: 1293: 1129:, p. 39-97. 1050:978-0-7566-9910-9 716: 715: 582:Kuhjoch section, 491:Usage information 472: 471: 452: 451: 1995: 1959:World portal 1957: 1956: 1946: 1945: 1908: 1872: 1832: 1801: 1798:Mesoproterozoic 1770: 1763: 1758: 1717: 1686: 1650: 1619: 1593: 1562: 1555: 1550: 1514: 1483: 1457: 1450: 1445: 1409: 1383: 1357: 1350: 1345: 1326: 1319: 1312: 1303: 1200: 1184: 1177: 1170: 1161: 1132: 1120: 1100: 1086: 1074: 1068: 1061: 1055: 1054: 1041:Prehistoric Life 1036: 1030: 1029: 1027: 1025: 1020: 996: 990: 989: 979: 958: 952: 951: 949: 941: 722:is the earliest 704: 703: 701: 700: 699: 698:51.1909; -3.2364 694: 690: 687: 686: 685: 682: 660:East Quantoxhead 624: 623: 621: 620: 619: 618:47.4839; 11.5306 614: 610: 607: 606: 605: 602: 441: 436: 324: 315: 306: 297: 288: 269: 257: 247: 236: 231: 226: 221: 216: 211: 206: 201: 196: 191: 186: 181: 176: 171: 166: 161: 156: 151: 146: 141: 136: 131: 126: 121: 115: 103: 33: 19: 2003: 2002: 1998: 1997: 1996: 1994: 1993: 1992: 1988:Geological ages 1968: 1967: 1966: 1961: 1951: 1940: 1932: 1914: 1906: 1899: 1870: 1859: 1830: 1823: 1799: 1792: 1768: 1767:Neoproterozoic 1757:(539 Ma–2.5 Ga) 1756: 1755: 1754:Proterozoic Eon 1744: 1715: 1708: 1684: 1677: 1648: 1641: 1617: 1610: 1591: 1584: 1560: 1548: 1547: 1536: 1512: 1505: 1481: 1474: 1455: 1443: 1442: 1431: 1407: 1400: 1381: 1374: 1355: 1343: 1342: 1335: 1330: 1300: 1295: 1290: 1269: 1243: 1209:Middle Jurassic 1193: 1191:Jurassic Period 1188: 1139: 1130: 1116: 1098: 1095: 1090: 1089: 1084:Wayback Machine 1075: 1071: 1062: 1058: 1051: 1038: 1037: 1033: 1023: 1021: 998: 997: 993: 977:10.1.1.736.9905 960: 959: 955: 947: 943: 942: 938: 933: 928: 916: 874: 872:Biostratigraphy 845:section in the 804:Luxembourg City 792:Hettange-Grande 788:Eugène Renevier 784: 697: 695: 691: 688: 683: 680: 678: 676: 675: 674: 617: 615: 611: 608: 603: 600: 598: 596: 595: 594: 473: 468: 467: 465: 448: 439: 432: 431: 427: 426: 422: 421: 417: 416: 410: 409: 403: 402: 396: 395: 389: 388: 382: 381: 375: 374: 368: 367: 361: 360: 354: 353: 347: 346: 340: 339: 333: 332: 326: 325: 320: 317: 316: 311: 308: 307: 302: 299: 298: 293: 290: 289: 284: 281: 280: 272: 271: 265: 261: 260: 255: 250: 249: 243: 237: 234: 232: 229: 227: 224: 222: 219: 217: 214: 212: 209: 207: 204: 202: 199: 197: 194: 192: 189: 187: 184: 182: 179: 177: 174: 172: 169: 167: 164: 162: 159: 157: 154: 152: 149: 147: 144: 142: 139: 137: 134: 132: 129: 127: 124: 122: 119: 102: 101: 100: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 39: 28: 27: 17: 12: 11: 5: 2001: 1999: 1991: 1990: 1985: 1983:Early Jurassic 1980: 1970: 1969: 1963: 1962: 1919: 1916: 1915: 1912: 1910: 1901: 1900: 1898: 1897: 1892: 1887: 1882: 1876: 1874: 1865: 1864: 1861: 1860: 1858: 1857: 1852: 1847: 1842: 1836: 1834: 1825: 1824: 1822: 1821: 1816: 1811: 1805: 1803: 1794: 1793: 1791: 1790: 1785: 1780: 1774: 1772: 1760: 1750: 1749: 1746: 1745: 1743: 1742: 1737: 1732: 1727: 1721: 1719: 1710: 1709: 1707: 1706: 1701: 1696: 1690: 1688: 1679: 1678: 1676: 1675: 1670: 1665: 1660: 1654: 1652: 1643: 1642: 1640: 1639: 1634: 1629: 1623: 1621: 1612: 1611: 1609: 1608: 1603: 1597: 1595: 1590:Carboniferous 1586: 1585: 1583: 1582: 1577: 1572: 1566: 1564: 1552: 1542: 1541: 1538: 1537: 1535: 1534: 1529: 1524: 1518: 1516: 1507: 1506: 1504: 1503: 1498: 1493: 1487: 1485: 1476: 1475: 1473: 1472: 1467: 1461: 1459: 1447: 1437: 1436: 1433: 1432: 1430: 1429: 1424: 1419: 1413: 1411: 1408:(23.0–66.0 Ma) 1402: 1401: 1399: 1398: 1393: 1387: 1385: 1382:(2.58–23.0 Ma) 1376: 1375: 1373: 1372: 1367: 1361: 1359: 1347: 1337: 1336: 1331: 1329: 1328: 1321: 1314: 1306: 1297: 1296: 1292: 1291: 1289: 1288: 1283: 1278: 1272: 1270: 1268: 1267: 1262: 1257: 1252: 1246: 1244: 1242: 1241: 1236: 1231: 1226: 1220: 1217: 1216: 1211: 1206: 1198: 1195: 1194: 1189: 1187: 1186: 1179: 1172: 1164: 1158: 1157: 1151: 1145: 1138: 1137:External links 1135: 1134: 1133: 1114: 1094: 1091: 1088: 1087: 1069: 1056: 1049: 1031: 991: 970:(3): 162–198. 953: 935: 934: 932: 929: 927: 924: 923: 922: 915: 912: 911: 910: 902: 894: 873: 870: 783: 780: 714: 713: 710: 706: 705: 657: 653: 652: 638: 634: 633: 630: 626: 625: 580: 576: 575: 560: 556: 555: 552: 548: 547: 542: 538: 537: 532: 528: 527: 523: 522: 521:ICS Time Scale 519: 515: 514: 507: 506:Regional usage 503: 502: 497: 496:Celestial body 493: 492: 488: 487: 484: 483:Name formality 480: 479: 475: 474: 470: 469: 457: 454: 453: 450: 449: 444: 442: 433: 429: 428: 424: 423: 419: 418: 412: 411: 405: 404: 398: 397: 391: 390: 384: 383: 377: 376: 370: 369: 363: 362: 356: 355: 349: 348: 342: 341: 335: 334: 328: 327: 319: 318: 310: 309: 301: 300: 292: 291: 283: 282: 274: 273: 263: 262: 252: 251: 241: 240: 238: 233: 228: 223: 218: 213: 208: 203: 198: 193: 188: 183: 178: 173: 168: 163: 158: 153: 148: 143: 138: 133: 128: 123: 118: 113: 110: 109: 105: 104: 97: 96: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 45: 40: 35: 34: 24: 23: 15: 13: 10: 9: 6: 4: 3: 2: 2000: 1989: 1986: 1984: 1981: 1979: 1976: 1975: 1973: 1960: 1955: 1949: 1944: 1938: 1935: 1930: 1926: 1922: 1917: 1911: 1909: 1902: 1896: 1893: 1891: 1888: 1886: 1883: 1881: 1878: 1877: 1875: 1873: 1866: 1856: 1853: 1851: 1848: 1846: 1843: 1841: 1838: 1837: 1835: 1833: 1826: 1820: 1817: 1815: 1812: 1810: 1807: 1806: 1804: 1802: 1795: 1789: 1786: 1784: 1781: 1779: 1776: 1775: 1773: 1771: 1769:(539 Ma–1 Ga) 1764: 1761: 1759: 1751: 1741: 1738: 1736: 1733: 1731: 1728: 1726: 1723: 1722: 1720: 1718: 1711: 1705: 1702: 1700: 1697: 1695: 1692: 1691: 1689: 1687: 1680: 1674: 1671: 1669: 1666: 1664: 1661: 1659: 1656: 1655: 1653: 1651: 1644: 1638: 1635: 1633: 1630: 1628: 1625: 1624: 1622: 1620: 1613: 1607: 1604: 1602: 1599: 1598: 1596: 1594: 1587: 1581: 1578: 1576: 1573: 1571: 1568: 1567: 1565: 1563: 1556: 1553: 1551: 1546:Paleozoic Era 1543: 1533: 1530: 1528: 1525: 1523: 1520: 1519: 1517: 1515: 1508: 1502: 1499: 1497: 1494: 1492: 1489: 1488: 1486: 1484: 1477: 1471: 1468: 1466: 1463: 1462: 1460: 1458: 1456:(66.0–145 Ma) 1451: 1448: 1446: 1444:(66.0–252 Ma) 1438: 1428: 1425: 1423: 1420: 1418: 1415: 1414: 1412: 1410: 1403: 1397: 1394: 1392: 1389: 1388: 1386: 1384: 1377: 1371: 1368: 1366: 1363: 1362: 1360: 1358: 1351: 1348: 1346: 1338: 1334: 1327: 1322: 1320: 1315: 1313: 1308: 1307: 1304: 1287: 1284: 1282: 1279: 1277: 1274: 1273: 1271: 1266: 1263: 1261: 1258: 1256: 1253: 1251: 1248: 1247: 1245: 1240: 1237: 1235: 1234:Pliensbachian 1232: 1230: 1227: 1225: 1222: 1221: 1219: 1218: 1215: 1212: 1210: 1207: 1205: 1202: 1201: 1196: 1192: 1185: 1180: 1178: 1173: 1171: 1166: 1165: 1162: 1155: 1152: 1149: 1146: 1144: 1141: 1140: 1136: 1128: 1124: 1119: 1115: 1112: 1108: 1104: 1097: 1096: 1092: 1085: 1081: 1078: 1073: 1070: 1066: 1060: 1057: 1052: 1046: 1042: 1035: 1032: 1019: 1014: 1010: 1006: 1002: 995: 992: 987: 983: 978: 973: 969: 965: 957: 954: 946: 940: 937: 930: 925: 921: 918: 917: 913: 909: 908: 903: 901: 900: 895: 893: 892: 887: 886: 885: 883: 882:Tethys domain 879: 871: 869: 867: 866: 865:Metophioceras 861: 860: 856: 852: 848: 844: 840: 836: 832: 831: 827: 824: 820: 816: 811: 809: 805: 801: 797: 793: 789: 781: 779: 777: 776: 771: 767: 763: 758: 756: 752: 749:(part of the 748: 744: 740: 736: 733: 729: 725: 721: 711: 707: 702: 673: 669: 665: 664:West Somerset 661: 658: 654: 651: 650: 645: 644: 639: 635: 631: 627: 622: 593: 589: 585: 581: 577: 573: 572: 568: 564: 561: 557: 553: 549: 546: 543: 539: 536: 533: 529: 524: 520: 516: 512: 508: 504: 501: 498: 494: 489: 485: 481: 476: 464: 463:, as of 2022. 462: 455: 447: 443: 438: 437: 434: 415: 408: 401: 394: 387: 380: 373: 366: 359: 352: 351:Pliensbachian 345: 338: 331: 323: 314: 305: 296: 287: 279: 278: 270: 268: 259: 258: 248: 246: 239: 117: 116: 111: 106: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 38: 32: 25: 20: 1933: 1869:Archean Eon 1831:(1.6–2.5 Ga) 1716:(485–539 Ma) 1685:(444–485 Ma) 1649:(419–444 Ma) 1618:(359–419 Ma) 1592:(299–359 Ma) 1561:(252–299 Ma) 1549:(252–539 Ma) 1513:(201–252 Ma) 1482:(145–201 Ma) 1441:Mesozoic Era 1341:Cenozoic Era 1281:Kimmeridgian 1223: 1126: 1122: 1118:Renevier, E. 1106: 1102: 1072: 1064: 1059: 1040: 1034: 1022:. Retrieved 1011:(1): 22–28. 1008: 1004: 994: 967: 963: 956: 939: 905: 897: 889: 875: 863: 857: 828: 812: 785: 773: 759: 719: 717: 647: 641: 569: 458: 400:Kimmeridgian 336: 275: 264: 253: 242: 1905:Hadean Eon 1683:Ordovician 1454:Cretaceous 1354:Quaternary 1131:(in French) 1024:23 December 849:of western 726:and lowest 696: / 616: / 1978:Hettangian 1972:Categories 1907:(4–4.6 Ga) 1871:(2.5–4 Ga) 1800:(1–1.6 Ga) 1406:Paleogene 1229:Sinemurian 1224:Hettangian 1093:Literature 1077:GSSP Table 926:References 859:Vermiceras 830:Psiloceras 800:Luxembourg 755:Sinemurian 720:Hettangian 681:51°11′27″N 604:11°31′50″E 601:47°29′02″N 526:Definition 414:Berriasian 344:Sinemurian 337:Hettangian 108:Chronology 22:Hettangian 1934:See also: 1714:Cambrian 1647:Silurian 1616:Devonian 1511:Triassic 1480:Jurassic 1286:Tithonian 1276:Oxfordian 1265:Callovian 1260:Bathonian 972:CiteSeerX 775:Alsatites 766:Blue Lias 684:3°14′11″W 478:Etymology 407:Tithonian 393:Oxfordian 386:Callovian 379:Bathonian 1559:Permian 1380:Neogene 1255:Bajocian 1250:Aalenian 1239:Toarcian 1080:Archived 1005:Episodes 964:Episodes 914:See also 904:zone of 896:zone of 888:zone of 878:biozones 823:ammonite 751:Triassic 747:Rhaetian 732:Jurassic 567:Ammonite 509:Global ( 372:Bajocian 365:Aalenian 358:Toarcian 330:Rhaetian 267:Jurassic 245:Mesozoic 880:in the 851:Austria 843:Kuhjoch 841:at the 737:of the 730:of the 668:England 592:Austria 565:of the 440:← 235:– 225:– 215:– 205:– 195:– 185:– 175:– 165:– 155:– 145:– 135:– 125:– 98:↓ 1913:  1067:(2004) 1065:et al. 1047:  974:  855:genera 819:System 815:Series 796:France 735:Period 554:Formal 486:Formal 430:  425:  420:  304:Middle 948:(PDF) 931:Notes 826:genus 728:stage 545:Stage 500:Earth 295:Early 1103:2004 1045:ISBN 1026:2020 862:and 835:GSSP 808:Metz 762:Lias 718:The 712:2000 646:and 632:2010 313:Late 37:PreꞒ 1013:doi 982:doi 806:to 724:age 563:FAD 535:Age 511:ICS 461:ICS 1974:: 1929:Ga 1925:Ma 1921:ka 1121:: 1109:, 1105:: 1101:; 1009:25 1007:. 1003:. 980:. 968:36 966:. 884:: 868:. 810:. 757:. 743:Ma 672:UK 670:, 666:, 662:, 590:, 586:, 322:EK 286:LT 87:Pg 31:Ma 1325:e 1318:t 1311:v 1183:e 1176:t 1169:v 1127:8 1113:. 1053:. 1028:. 1015:: 988:. 984:: 574:. 513:) 277:K 256:T 92:N 82:K 77:J 72:T 67:P 62:C 57:D 52:S 47:O 42:Ꞓ

Index

Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N
Mesozoic
T
Jurassic
K
LT
Early
Middle
Late
EK
Rhaetian
Hettangian
Sinemurian
Pliensbachian
Toarcian
Aalenian
Bajocian
Bathonian

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