Knowledge

Sandbian

Source 📝

1879: 1902: 1868: 946:
Korochantseva, Ekaterina; Trieloff, Mario; Lorenz, Cyrill; Buykin, Alexey; Ivanova, Marina; Schwarz, Winfried; Hopp, Jens; Jessberger, Elmar (2007). "L-chondrite asteroid breakup tied to Ordovician meteorite shower by multiple isochron 40 Ar- 39 Ar dating".
1030:
It has been suggested that the Middle Ordovician meteorite bombardment played a crucial role in the Great Ordovician Biodiversification Event, but this study shows that the two phenomena were unrelated
901: 676: 1102:"The Global Stratotype Section and Point (GSSP) for the base of the Katian Stage of the Upper Ordovician Series at Black Knob Ridge, Southeastern Oklahoma, USA" 874: 765: 605: 1248: 1191:"A proposed global boundary stratotype for the base of the Upper Series of the Ordovician System: The Fågelsång section, Scania, southern Sweden" 1062:"A proposed global boundary stratotype for the base of the Upper Series of the Ordovician System: The Fågelsång section, Scania, southern Sweden" 1162:
Bergström, Stig; Finney, Stanley; Xu, Chen; Goldman, Daniel; Leslie, Stephen (31 August 2006). "Three new Ordovician global stage names".
1946: 1241: 545: 495: 1234: 1975: 812: 698: 631: 1939: 1100:
Goldman, Daniel; Leslie, Stephen; Nõlvak, Jaak; Young, Seth; Bergström, Stig; Huff, Warren (December 2007).
769:
around 458.4 million years ago. The Sandbian lasted for about 5.4 million years until the beginning of the
1257: 1140: 534: 1980: 1060:
Bergström, Stig; Finney, S.; Xu, Chen; Pålsson, Christian; Zhi-hao, Wang; Grahn, Yngve (June 2000).
1970: 1932: 1530: 1525: 478: 1189:
Bergström, Stig M.; S. C. Finney; Chen Xu; Christian Pålsson; Wang Zhi-hao; Yngve Grahn (2000).
865: 756: 597: 984:"Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification" 982:
Lindskog, A.; Costa, M. M.; Rasmussen, C.M.Ø.; Connelly, J. N.; Eriksson, M. E. (2017-01-24).
1042: 960: 956: 579: 1209: 1118: 1078: 8: 1861: 1016: 983: 968: 923: 896: 1965: 1659: 1623: 1101: 1061: 1021: 1003: 928: 786: 345: 304: 1912: 1753: 1628: 1597: 1394: 1205: 1171: 1113: 1073: 1011: 995: 964: 918: 910: 744: 337: 287: 1920: 1853: 1849: 1845: 1722: 1618: 1556: 1451: 1420: 1389: 323: 30: 1878: 790: 782: 1916: 1872: 1691: 1561: 1456: 1425: 1161: 1226: 1190: 1175: 1959: 1592: 1582: 1551: 1514: 1446: 1415: 1188: 1007: 827: 814: 713: 700: 692: 646: 633: 569: 61: 1883: 1814: 1664: 1587: 1025: 932: 914: 841: 617: 1901: 1809: 1678: 1654: 1499: 1294: 748: 381: 354: 36: 999: 1909: 1804: 1764: 1707: 1607: 1504: 1378: 1278: 869: 760: 601: 453: 417: 408: 243: 81: 46: 1867: 1819: 1769: 1743: 1702: 1649: 1494: 1470: 1351: 1341: 1330: 372: 279: 207: 86: 1779: 1774: 1738: 1638: 1571: 1540: 1435: 1404: 1365: 1315: 1289: 1265: 861: 688: 271: 233: 76: 71: 56: 51: 41: 849: 621: 1793: 1733: 1483: 1320: 1304: 945: 91: 66: 1829: 1712: 1346: 853: 794: 770: 752: 625: 456: 399: 363: 981: 857: 845: 806: 1133: 1099: 1059: 864:. The lower boundary of the Sandbian is defined as the 894: 107: 1957: 1256: 494:Subdivision of the Ordovician according to the 781:The name Sandbian is derived from the village 1940: 1242: 1182: 1155: 897:"The microfossil record of early land plants" 1049:. International Commission on Stratigraphy. 501:Vertical axis scale: millions of years ago. 1947: 1933: 1249: 1235: 809:of the Sandbian is the Fågelsång section ( 1117: 1077: 1015: 922: 755:. Its lower boundary is defined as the 1958: 491: 16:First age of the Late Ordovician epoch 1230: 1896: 466: 440: 1848:= kiloannum (thousands years ago); 949:Meteoritics & Planetary Science 13: 1852:= megaannum (millions years ago); 969:10.1111/j.1945-5100.2007.tb00221.x 797:). The name was proposed in 2006. 14: 1992: 1856:= gigaannum (billions years ago). 1900: 1877: 1866: 895:Wellman, C.H.; Gray, J. (2000). 34: 1210:10.18814/epiiugs/2000/v23i2/003 1143:. Geologic Timescale Foundation 1119:10.18814/epiiugs/2007/v30i4/002 1079:10.18814/epiiugs/2000/v23i2/003 1093: 1053: 1035: 975: 939: 888: 773:around 453 million years ago. 439: 1: 1295:Pleistocene (11.7 ka–2.58 Ma) 881: 1919:. You can help Knowledge by 1908:This article related to the 1141:"GSSP Table - Paleozoic Era" 7: 1258:Geological history of Earth 677:Diplacanthograptus caudatus 492: 202: 10: 1997: 1895: 1531:Mississippian (323–359 Ma) 1526:Pennsylvanian (299–323 Ma) 1290:Holocene (present–11.7 ka) 743:is the first stage of the 687:Black Knob Ridge section, 29:458.4 ± 0.9 – 453.0 ± 0.7 1843: 1828: 1815:Paleoarchean (3.2–3.6 Ga) 1792: 1752: 1721: 1690: 1677: 1665:Terreneuvian (521–539 Ma) 1637: 1606: 1570: 1539: 1513: 1482: 1469: 1434: 1403: 1377: 1364: 1329: 1303: 1277: 1264: 1176:10.1080/00241160600847439 776: 729: 683: 671:Upper boundary definition 670: 662: 612: 594:Lower boundary definition 593: 585: 575: 565: 560: 552: 540: 530: 525: 517: 512: 105: 100: 26: 21: 1976:Ordovician geochronology 1810:Mesoarchean (2.8–3.2 Ga) 1655:Miaolingian (497–509 Ma) 1500:Guadalupian (260–272 Ma) 1352:Paleocene (56.0–66.0 Ma) 1342:Oligocene (23.0–33.9 Ma) 751:and is succeeded by the 110: 1805:Neoarchean (2.5–2.8 Ga) 1770:Orosirian (1.8–2.05 Ga) 1765:Statherian (1.6–1.8 Ga) 1708:Cryogenian (635–720 Ma) 1598:Llandovery (433–444 Ma) 1505:Cisuralian (272–299 Ma) 1316:Pliocene (2.59–5.33 Ma) 961:2007M&PS...42..113K 856:). It is an outcrop of 800: 479:Ordovician meteor event 193:−445 — 183:−450 — 173:−455 — 163:−460 — 153:−465 — 143:−470 — 133:−475 — 123:−480 — 113:−485 — 1775:Rhyacian (2.05–2.3 Ga) 1744:Calymmian (1.4–1.6 Ga) 1703:Ediacaran (539–635 Ma) 1650:Furongian (485–497 Ma) 1495:Lopingian (252–260 Ma) 1321:Miocene (5.33–23.0 Ma) 915:10.1098/rstb.2000.0612 902:Phil. Trans. R. Soc. B 866:first appearance datum 757:first appearance datum 674:FAD of the Graptolite 1780:Siderian (2.3–2.5 Ga) 1739:Ectasian (1.2–1.4 Ga) 1660:Series 2 (509–521 Ma) 1347:Eocene (33.9–56.0 Ma) 988:Nature Communications 1820:Eoarchean (3.6–4 Ga) 1713:Tonian (720 Ma–1 Ga) 1593:Wenlock (427–433 Ma) 1583:Pridoli (419–423 Ma) 1047:www.stratigraphy.org 875:Nemagraptus gracilis 766:Nemagraptus gracilis 606:Nemagraptus gracilis 1875: • 1864: • 1862:Geologic time scale 1624:Middle (458–470 Ma) 1588:Ludlow (423–427 Ma) 1557:Middle (383–393 Ma) 1452:Middle (237–247 Ma) 1421:Middle (164–174 Ma) 1000:10.1038/ncomms14066 828:55.7137°N 13.3255°E 824: /  730:Upper GSSP ratified 714:34.4305°N 96.0746°W 710: /  684:Upper boundary GSSP 663:Lower GSSP ratified 647:55.7137°N 13.3255°E 643: /  616:Fågelsång section, 613:Lower boundary GSSP 586:Time span formality 1873:Geology portal 1734:Stenian (1–1.2 Ga) 1629:Early (470–485 Ma) 1562:Early (393–419 Ma) 1457:Early (247–252 Ma) 1426:Early (174–201 Ma) 1395:Early (100–145 Ma) 1390:Late (66.0–100 Ma) 1043:"Chart/Time Scale" 576:Stratigraphic unit 566:Chronological unit 553:Time scale(s) used 1928: 1927: 1890: 1889: 1788: 1787: 1754:Paleoproterozoic 1673: 1672: 1619:Late (444–458 Ma) 1552:Late (359–383 Ma) 1465: 1464: 1447:Late (201–237 Ma) 1416:Late (145–164 Ma) 1360: 1359: 1281:(present–2.58 Ma) 1269:(present–66.0 Ma) 909:(1398): 717–732. 878:in that section. 787:Lund Municipality 747:. It follows the 737: 736: 719:34.4305; -96.0746 526:Usage information 507: 506: 487: 486: 465: 464: 1988: 1981:Ordovician stubs 1949: 1942: 1935: 1904: 1897: 1884:World portal 1882: 1881: 1871: 1870: 1833: 1797: 1757: 1726: 1723:Mesoproterozoic 1695: 1688: 1687: 1683: 1642: 1611: 1575: 1544: 1518: 1487: 1480: 1479: 1475: 1439: 1408: 1382: 1375: 1374: 1370: 1334: 1308: 1282: 1275: 1274: 1270: 1251: 1244: 1237: 1228: 1227: 1221: 1220: 1218: 1216: 1195: 1186: 1180: 1179: 1159: 1153: 1152: 1150: 1148: 1137: 1131: 1130: 1128: 1126: 1121: 1097: 1091: 1090: 1088: 1086: 1081: 1057: 1051: 1050: 1039: 1033: 1032: 1019: 979: 973: 972: 943: 937: 936: 926: 892: 839: 838: 836: 835: 834: 833:55.7137; 13.3255 829: 825: 822: 821: 820: 817: 745:Upper Ordovician 725: 724: 722: 721: 720: 715: 711: 708: 707: 706: 703: 658: 657: 655: 654: 653: 652:55.7137; 13.3255 648: 644: 641: 640: 639: 636: 481: 472: 467: 459: 446: 441: 420: 411: 402: 393: 384: 375: 366: 357: 332: 317: 298: 265: 227: 199: 194: 189: 184: 179: 174: 169: 164: 159: 154: 149: 144: 139: 134: 129: 124: 119: 114: 108: 96: 33: 19: 18: 1996: 1995: 1991: 1990: 1989: 1987: 1986: 1985: 1971:Late Ordovician 1956: 1955: 1954: 1953: 1893: 1891: 1886: 1876: 1865: 1857: 1839: 1831: 1824: 1795: 1784: 1755: 1748: 1724: 1717: 1693: 1692:Neoproterozoic 1682:(539 Ma–2.5 Ga) 1681: 1680: 1679:Proterozoic Eon 1669: 1640: 1633: 1609: 1602: 1573: 1566: 1542: 1535: 1516: 1509: 1485: 1473: 1472: 1461: 1437: 1430: 1406: 1399: 1380: 1368: 1367: 1356: 1332: 1325: 1306: 1299: 1280: 1268: 1267: 1260: 1255: 1225: 1224: 1214: 1212: 1193: 1187: 1183: 1160: 1156: 1146: 1144: 1139: 1138: 1134: 1124: 1122: 1098: 1094: 1084: 1082: 1058: 1054: 1041: 1040: 1036: 980: 976: 944: 940: 893: 889: 884: 832: 830: 826: 823: 818: 815: 813: 811: 810: 803: 779: 718: 716: 712: 709: 704: 701: 699: 697: 696: 695: 651: 649: 645: 642: 637: 634: 632: 630: 629: 628: 508: 503: 502: 500: 483: 482: 477: 470: 461: 460: 451: 444: 437: 436: 432: 431: 427: 426: 422: 421: 416: 413: 412: 407: 404: 403: 398: 395: 394: 389: 386: 385: 380: 377: 376: 371: 368: 367: 362: 359: 358: 353: 350: 349: 341: 340: 334: 333: 329: 327: 325: 322: 319: 318: 314: 312: 310: 308: 306: 303: 300: 299: 295: 293: 291: 289: 286: 283: 282: 276: 275: 267: 266: 261: 259: 257: 255: 253: 251: 249: 247: 245: 241: 238: 237: 229: 228: 223: 221: 219: 217: 215: 213: 211: 209: 205: 200: 197: 195: 192: 190: 187: 185: 182: 180: 177: 175: 172: 170: 167: 165: 162: 160: 157: 155: 152: 150: 147: 145: 142: 140: 137: 135: 132: 130: 127: 125: 122: 120: 117: 115: 112: 95: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 39: 28: 27: 17: 12: 11: 5: 1994: 1984: 1983: 1978: 1973: 1968: 1952: 1951: 1944: 1937: 1929: 1926: 1925: 1905: 1888: 1887: 1844: 1841: 1840: 1837: 1835: 1826: 1825: 1823: 1822: 1817: 1812: 1807: 1801: 1799: 1790: 1789: 1786: 1785: 1783: 1782: 1777: 1772: 1767: 1761: 1759: 1750: 1749: 1747: 1746: 1741: 1736: 1730: 1728: 1719: 1718: 1716: 1715: 1710: 1705: 1699: 1697: 1685: 1675: 1674: 1671: 1670: 1668: 1667: 1662: 1657: 1652: 1646: 1644: 1635: 1634: 1632: 1631: 1626: 1621: 1615: 1613: 1604: 1603: 1601: 1600: 1595: 1590: 1585: 1579: 1577: 1568: 1567: 1565: 1564: 1559: 1554: 1548: 1546: 1537: 1536: 1534: 1533: 1528: 1522: 1520: 1515:Carboniferous 1511: 1510: 1508: 1507: 1502: 1497: 1491: 1489: 1477: 1467: 1466: 1463: 1462: 1460: 1459: 1454: 1449: 1443: 1441: 1432: 1431: 1429: 1428: 1423: 1418: 1412: 1410: 1401: 1400: 1398: 1397: 1392: 1386: 1384: 1372: 1362: 1361: 1358: 1357: 1355: 1354: 1349: 1344: 1338: 1336: 1333:(23.0–66.0 Ma) 1327: 1326: 1324: 1323: 1318: 1312: 1310: 1307:(2.58–23.0 Ma) 1301: 1300: 1298: 1297: 1292: 1286: 1284: 1272: 1262: 1261: 1254: 1253: 1246: 1239: 1231: 1223: 1222: 1204:(2): 102–109. 1181: 1170:(3): 287–288. 1154: 1132: 1112:(4): 258–270. 1092: 1072:(2): 102–109. 1052: 1034: 974: 955:(1): 113–130. 938: 886: 885: 883: 880: 802: 799: 778: 775: 735: 734: 731: 727: 726: 685: 681: 680: 672: 668: 667: 664: 660: 659: 614: 610: 609: 595: 591: 590: 587: 583: 582: 577: 573: 572: 567: 563: 562: 558: 557: 556:ICS Time Scale 554: 550: 549: 542: 541:Regional usage 538: 537: 532: 531:Celestial body 528: 527: 523: 522: 519: 518:Name formality 515: 514: 510: 509: 505: 504: 489: 488: 485: 484: 476: 475: 473: 463: 462: 450: 449: 447: 438: 434: 433: 429: 428: 424: 423: 415: 414: 406: 405: 397: 396: 388: 387: 379: 378: 370: 369: 361: 360: 352: 351: 343: 342: 336: 335: 321: 320: 302: 301: 285: 284: 278: 277: 269: 268: 240: 239: 231: 230: 204: 203: 201: 196: 191: 186: 181: 176: 171: 166: 161: 156: 151: 146: 141: 136: 131: 126: 121: 116: 111: 106: 103: 102: 98: 97: 90: 85: 80: 75: 70: 65: 60: 55: 50: 45: 40: 35: 24: 23: 15: 9: 6: 4: 3: 2: 1993: 1982: 1979: 1977: 1974: 1972: 1969: 1967: 1964: 1963: 1961: 1950: 1945: 1943: 1938: 1936: 1931: 1930: 1924: 1922: 1918: 1914: 1911: 1906: 1903: 1899: 1898: 1894: 1885: 1880: 1874: 1869: 1863: 1860: 1855: 1851: 1847: 1842: 1836: 1834: 1827: 1821: 1818: 1816: 1813: 1811: 1808: 1806: 1803: 1802: 1800: 1798: 1791: 1781: 1778: 1776: 1773: 1771: 1768: 1766: 1763: 1762: 1760: 1758: 1751: 1745: 1742: 1740: 1737: 1735: 1732: 1731: 1729: 1727: 1720: 1714: 1711: 1709: 1706: 1704: 1701: 1700: 1698: 1696: 1694:(539 Ma–1 Ga) 1689: 1686: 1684: 1676: 1666: 1663: 1661: 1658: 1656: 1653: 1651: 1648: 1647: 1645: 1643: 1636: 1630: 1627: 1625: 1622: 1620: 1617: 1616: 1614: 1612: 1605: 1599: 1596: 1594: 1591: 1589: 1586: 1584: 1581: 1580: 1578: 1576: 1569: 1563: 1560: 1558: 1555: 1553: 1550: 1549: 1547: 1545: 1538: 1532: 1529: 1527: 1524: 1523: 1521: 1519: 1512: 1506: 1503: 1501: 1498: 1496: 1493: 1492: 1490: 1488: 1481: 1478: 1476: 1471:Paleozoic Era 1468: 1458: 1455: 1453: 1450: 1448: 1445: 1444: 1442: 1440: 1433: 1427: 1424: 1422: 1419: 1417: 1414: 1413: 1411: 1409: 1402: 1396: 1393: 1391: 1388: 1387: 1385: 1383: 1381:(66.0–145 Ma) 1376: 1373: 1371: 1369:(66.0–252 Ma) 1363: 1353: 1350: 1348: 1345: 1343: 1340: 1339: 1337: 1335: 1328: 1322: 1319: 1317: 1314: 1313: 1311: 1309: 1302: 1296: 1293: 1291: 1288: 1287: 1285: 1283: 1276: 1273: 1271: 1263: 1259: 1252: 1247: 1245: 1240: 1238: 1233: 1232: 1229: 1211: 1207: 1203: 1199: 1192: 1185: 1177: 1173: 1169: 1165: 1158: 1142: 1136: 1120: 1115: 1111: 1107: 1103: 1096: 1080: 1075: 1071: 1067: 1063: 1056: 1048: 1044: 1038: 1031: 1027: 1023: 1018: 1013: 1009: 1005: 1001: 997: 993: 989: 985: 978: 970: 966: 962: 958: 954: 950: 942: 934: 930: 925: 920: 916: 912: 908: 904: 903: 898: 891: 887: 879: 877: 876: 871: 867: 863: 859: 855: 851: 847: 843: 837: 808: 798: 796: 792: 788: 784: 774: 772: 768: 767: 762: 758: 754: 750: 746: 742: 732: 728: 723: 694: 693:United States 690: 686: 682: 679: 678: 673: 669: 665: 661: 656: 627: 623: 619: 615: 611: 608: 607: 603: 599: 596: 592: 588: 584: 581: 578: 574: 571: 568: 564: 559: 555: 551: 547: 543: 539: 536: 533: 529: 524: 520: 516: 511: 499: 498:, as of 2021. 497: 490: 480: 474: 469: 468: 458: 455: 448: 443: 442: 419: 410: 401: 392: 383: 374: 365: 356: 348: 347: 339: 331: 316: 297: 281: 274: 273: 264: 263: 236: 235: 226: 225: 109: 104: 99: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 38: 32: 25: 20: 1921:expanding it 1907: 1892: 1858: 1794:Archean Eon 1756:(1.6–2.5 Ga) 1641:(485–539 Ma) 1610:(444–485 Ma) 1574:(419–444 Ma) 1543:(359–419 Ma) 1517:(299–359 Ma) 1486:(252–299 Ma) 1474:(252–539 Ma) 1438:(201–252 Ma) 1407:(145–201 Ma) 1366:Mesozoic Era 1266:Cenozoic Era 1215:20 September 1213:. Retrieved 1201: 1197: 1184: 1167: 1163: 1157: 1145:. Retrieved 1135: 1123:. Retrieved 1109: 1105: 1095: 1083:. Retrieved 1069: 1065: 1055: 1046: 1037: 1029: 991: 987: 977: 952: 948: 941: 906: 900: 890: 873: 842:Sularp Brook 804: 791:Skåne County 783:Södra Sandby 780: 764: 740: 738: 675: 618:Sularp Brook 604: 493: 390: 344: 270: 242: 232: 206: 1830:Hadean Eon 1608:Ordovician 1379:Cretaceous 1279:Quaternary 1125:13 December 1085:13 December 831: / 749:Darriwilian 717: / 650: / 382:Darriwilian 355:Tremadocian 1960:Categories 1910:Ordovician 1832:(4–4.6 Ga) 1796:(2.5–4 Ga) 1725:(1–1.6 Ga) 1331:Paleogene 1147:2 December 882:References 870:graptolite 844:, east of 819:13°19′32″E 816:55°42′49″N 761:graptolite 705:96°04′29″W 702:34°25′50″N 638:13°19′32″E 635:55°42′49″N 602:Graptolite 561:Definition 454:land plant 418:Rhuddanian 409:Hirnantian 101:Chronology 1859:See also: 1639:Cambrian 1572:Silurian 1541:Devonian 1436:Triassic 1405:Jurassic 1008:2041-1723 994:: 14066. 513:Etymology 373:Dapingian 1966:Sandbian 1484:Permian 1305:Neogene 1198:Episodes 1106:Episodes 1066:Episodes 1026:28117834 933:10905606 862:mudstone 763:species 741:Sandbian 689:Oklahoma 544:Global ( 391:Sandbian 346:Stage 10 22:Sandbian 1164:Lethaia 1017:5286199 957:Bibcode 924:1692785 872:species 759:of the 600:of the 471:← 445:← 198:– 188:– 178:– 168:– 158:– 148:– 138:– 128:– 118:– 1913:period 1838:  1024:  1014:  1006:  931:  921:  854:Sweden 795:Sweden 777:Naming 771:Katian 753:Katian 626:Sweden 589:Formal 521:Formal 457:spores 452:First 435:  430:  425:  400:Katian 364:Floian 1915:is a 1194:(PDF) 858:shale 850:Skåne 840:) at 622:Skåne 580:Stage 535:Earth 1917:stub 1217:2012 1149:2012 1127:2020 1087:2020 1022:PMID 1004:ISSN 929:PMID 860:and 846:Lund 807:GSSP 805:The 801:GSSP 739:The 733:2006 666:2002 37:PreꞒ 1206:doi 1172:doi 1114:doi 1074:doi 1012:PMC 996:doi 965:doi 919:PMC 911:doi 907:355 868:of 598:FAD 570:Age 546:ICS 496:ICS 1962:: 1854:Ga 1850:Ma 1846:ka 1202:23 1200:. 1196:. 1168:39 1166:. 1110:30 1108:. 1104:. 1070:23 1068:. 1064:. 1045:. 1028:. 1020:. 1010:. 1002:. 990:. 986:. 963:. 953:42 951:. 927:. 917:. 905:. 899:. 852:, 793:, 789:, 691:, 624:, 620:, 224:c 222:i 220:o 218:z 216:o 214:e 212:l 210:a 208:P 87:Pg 31:Ma 1948:e 1941:t 1934:v 1923:. 1250:e 1243:t 1236:v 1219:. 1208:: 1178:. 1174:: 1151:. 1129:. 1116:: 1089:. 1076:: 998:: 992:8 971:. 967:: 959:: 935:. 913:: 848:( 785:( 548:) 338:L 330:e 328:t 326:a 324:L 315:e 313:l 311:d 309:d 307:i 305:M 296:y 294:l 292:r 290:a 288:E 280:F 272:S 262:n 260:a 258:i 256:c 254:i 252:v 250:o 248:d 246:r 244:O 234:Ꞓ 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
P
a
l
e
o
z
o
i
c


O
r
d
o
v
i
c
i
a
n

S
F
E
a
r
l
y

M
i
d
d
l
e

L
a
t
e

L
Stage 10
Tremadocian
Floian
Dapingian
Darriwilian
Sandbian
Katian
Hirnantian

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.