Knowledge (XXG)

Cambrian Series 2

Source πŸ“

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The Ordian stage, which is use in Australian chronostratigraphical scale, was originally supposed to be the lowest stage of the Miaolingian, but may belong to upper Series 2. As of 2024, the base of the Ordian is not defined yet.
1161:. Correlating this event on different continents has proven difficult and resolving this is essential for the definition of the lower boundary of this series. Currently the oldest trilobite known is 1490:
Zhang, Wenhao; et al. (2014). "Mass-occurrence of oncoids at the Cambrian Series 2–Series 3 transition: Implications for microbial resurgence following an Early Cambrian extinction".
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and the marine environment are posited as the most likely cause of this extinction. At the Series 2–Miaolingian boundary, the first major trilobite extinction, known as the
1109:
yet. In part the new name will replace the older terms "Lower Cambrian" and "Early Cambrian". The nomenclature used in Siberia uses the term "Yakutian" for this series.
1247:"Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China" 1587: 1558: 1476: 1359: 1261: 1317:"Age of the lower Cambrian Vanadium deposit, East Guizhou, South China: Evidences from age of tuff and carbon isotope analysis along the Bagong section" 1791: 1650: 1118: 1102: 1082: 915: 866: 1447:
John R. Laurie, Peter D. Kruse, Glenn A. Brock, James D. Holmes, James B. Jago, Marissa J. Betts, John R. Paterson, Patrick M. Smith (April 2024).
1784: 1609: 1294: 1621: 1519:"Chemostratigraphic correlations across the first major trilobite extinction and faunal turnovers between Laurentia and South China" 1402: 2457: 1643: 1374: 1129:. Both of these stages also lack formal definition. The Siberian nomenclature distinguishes three stages (lowest first): 1025: 1807: 904: 2462: 2452: 1246: 1183: 1636: 1574:"Chronostratigraphy of the Cambrian Series 2 -Miaolingian boundary, western Stansbury Basin, South Australia" 2080: 2075: 1086: 999: 975: 800: 1290: 1552: 1517:
Jih-Pai Lin, Frederick A. Sundberg, Ganqing Jiang, Isabel P. MontaΓ±ez, Thomas Wotte (22 November 2019).
1470: 949: 1011: 2411: 1085:, lacking a precise lower boundary and subdivision into stages. The proposed lower boundary is the 1187: 780: 740: 2428: 1174:
The end of the 2nd series of the Cambrian is marked by the first major biotic extinction of the
2173: 1760: 1581: 1572:
Courtney Birksmith, Glenn A. Brock, Marissa J. Betts, James D. Holmes, Zhiliang Zhang (2023).
1338: 1207: 519: 1605: 2303: 2178: 2147: 1944: 1718: 1713: 1702: 1538: 1530: 1499: 1456: 1413: 1328: 1126: 1122: 698: 461: 448: 435: 2272: 2168: 2106: 2001: 1970: 1939: 1617: 1179: 939: 1360:"The 13th International Field Conference of the Cambrian Stage Subdivision Working Group" 1423: 2422: 2241: 2111: 2006: 1975: 1543: 1142: 847: 773: 237: 2446: 2142: 2132: 2101: 2064: 1996: 1965: 1573: 1518: 1448: 1403:"Tentative correlation of Cambrian Series 2 between South China and other continents" 748: 677: 657: 636: 596: 61: 2433: 2417: 2364: 2214: 2137: 1755: 1672: 1191: 1074: 508: 319: 1461: 2359: 2228: 2204: 2049: 1844: 1682: 1078: 820: 616: 374: 36: 1534: 1157:
The beginning of the 2nd series of the Cambrian is marked by the appearance of
2354: 2314: 2257: 2157: 2054: 1928: 1828: 1776: 1739: 1163: 1158: 1130: 1090: 769: 744: 490: 415: 310: 81: 46: 1503: 1418: 1342: 1040: 1027: 2369: 2319: 2293: 2252: 2199: 2044: 2020: 1901: 1891: 1880: 1697: 1687: 1195: 1175: 979: 720: 423: 397: 276: 250: 86: 1333: 2329: 2324: 2288: 2188: 2121: 2090: 1985: 1954: 1915: 1865: 1839: 1815: 1659: 1141:. In general most subdivisions of this series rely on biostratigraphy of 1138: 1134: 1106: 1070: 286: 76: 71: 56: 51: 41: 1316: 2343: 2283: 2033: 1870: 1854: 1750: 1734: 1729: 1206:
fossils are absent, the Series 2–Miaolingian boundary is determined by
1015: 777: 499: 481: 472: 91: 66: 2379: 2262: 1896: 575: 1628: 1019: 1401:
Yuan, J.L.; Zhu, X.J.; Lin, J.P.; Zhu, M.Y. (22 September 2011).
1227: 2403: 2399: 2395: 30: 1780: 1632: 1315:
Wu, Tong; Yang, Ruidong; Gao, Junbo; Li, Jun (1 January 2021).
1576:. Conference: Palaeo Down Under 3 at Perth, Western Australia. 836: 107: 1285: 1283: 1281: 1202:
appear after this global extinction, and in areas where
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which is estimated to be around 521 million years ago.
1186:, occurred. In particular, trilobites of the families 1453:
Alcheringa: An Australasian Journal of Palaeontology
2378: 2342: 2302: 2271: 2240: 2227: 2187: 2156: 2120: 2089: 2063: 2032: 2019: 1984: 1953: 1927: 1914: 1879: 1853: 1827: 1814: 1056: 1007: 993: 985: 971: 963: 955: 945: 935: 930: 922: 910: 900: 895: 887: 882: 100: 21: 1449:"The quest for an Australian Cambrian stage scale" 1354: 1352: 1081:. Series 2 has not been formally defined by the 1117:The 2nd series is currently subdivided by the 1792: 1644: 865:Subdivision of the Cambrian according to the 8: 1620:. International Commission on Stratigraphy. 1586:: CS1 maint: multiple names: authors list ( 1557:: CS1 maint: multiple names: authors list ( 1475:: CS1 maint: multiple names: authors list ( 1396: 1394: 1234:. International Commission on Stratigraphy. 2237: 2029: 1924: 1824: 1799: 1785: 1777: 1668: 1651: 1637: 1629: 872:Vertical axis scale: millions of years ago 1542: 1460: 1417: 1332: 1198:and South China, respectively. The first 1103:International Commission on Stratigraphy 1083:International Commission on Stratigraphy 986:Lower boundary GSSP candidate section(s) 1219: 832: 1579: 1550: 1468: 18: 7: 1105:has not named the 2nd series of the 972:Lower boundary definition candidates 809: 789: 757: 729: 708: 687: 666: 646: 625: 605: 585: 564: 2398:= kiloannum (thousands years ago); 2402:= megaannum (millions years ago); 1618:"GSSPs - The Cambrian System 2019" 16:Unnamed 2nd series of the Cambrian 14: 2406:= gigaannum (billions years ago). 1167:which marks the beginning of the 1069:is the unnamed 2nd series of the 2427: 2416: 1624:from the original on 2023-07-21. 1612:from the original on 2023-10-08. 1297:from the original on 2023-10-08 1267:from the original on 2022-03-04 1245:Zhao; et al. (June 2019). 1: 1845:Pleistocene (11.7 ka–2.58 Ma) 1462:10.1080/03115518.2024.2327045 1606:"GSSP Table - Paleozoic Era" 1373:(4): 440–441. Archived from 1291:"GSSP Table - Paleozoic Era" 1808:Geological history of Earth 2479: 2081:Mississippian (323–359 Ma) 2076:Pennsylvanian (299–323 Ma) 1840:Holocene (present–11.7 ka) 1535:10.1038/s41598-019-53685-2 1184:Olenellid Biomere boundary 2393: 2365:Paleoarchean (3.2–3.6 Ga) 2215:Terreneuvian (521–539 Ma) 1666: 994:Upper boundary definition 964:Lower boundary definition 862: 858: 835: 105: 26: 2360:Mesoarchean (2.8–3.2 Ga) 2205:Miaolingian (497–509 Ma) 2050:Guadalupian (260–272 Ma) 1902:Paleocene (56.0–66.0 Ma) 1892:Oligocene (23.0–33.9 Ma) 1504:10.1016/j.gr.2014.03.015 1419:10.3140/bull.geosci.1274 2355:Neoarchean (2.5–2.8 Ga) 2320:Orosirian (1.8–2.05 Ga) 2315:Statherian (1.6–1.8 Ga) 2258:Cryogenian (635–720 Ma) 2148:Llandovery (433–444 Ma) 2055:Cisuralian (272–299 Ma) 1866:Pliocene (2.59–5.33 Ma) 1410:Bulletin of Geosciences 743:diversification, first 223:−485 — 213:−490 — 203:−495 — 193:−500 — 183:−505 — 173:−510 — 163:−515 — 153:−520 — 143:−525 — 133:−530 — 123:−535 — 113:−540 — 2458:Cambrian geochronology 2325:Rhyacian (2.05–2.3 Ga) 2294:Calymmian (1.4–1.6 Ga) 2253:Ediacaran (539–635 Ma) 2200:Furongian (485–497 Ma) 2045:Lopingian (252–260 Ma) 1871:Miocene (5.33–23.0 Ma) 1000:Oryctocephalus indicus 801:Baykonurian glaciation 2330:Siderian (2.3–2.5 Ga) 2289:Ectasian (1.2–1.4 Ga) 2210:Series 2 (509–521 Ma) 1897:Eocene (33.9–56.0 Ma) 1334:10.1515/geo-2020-0287 1194:have been extinct in 1077:series and below the 2370:Eoarchean (3.6–4 Ga) 2263:Tonian (720 Ma–1 Ga) 2143:Wenlock (427–433 Ma) 2133:Pridoli (419–423 Ma) 1073:. It lies above the 1041:26.0807Β°N 108.4138Β°E 967:Not formally defined 2425: • 2414: • 2412:Geologic time scale 2174:Middle (458–470 Ma) 2138:Ludlow (423–427 Ma) 2107:Middle (383–393 Ma) 2002:Middle (237–247 Ma) 1971:Middle (164–174 Ma) 1057:Upper GSSP ratified 1037: /  1008:Upper boundary GSSP 956:Time span formality 2423:Geology portal 2284:Stenian (1–1.2 Ga) 2179:Early (470–485 Ma) 2112:Early (393–419 Ma) 2007:Early (247–252 Ma) 1976:Early (174–201 Ma) 1945:Early (100–145 Ma) 1940:Late (66.0–100 Ma) 1523:Scientific Reports 1228:"Chart/Time Scale" 1208:chemostratigraphic 946:Stratigraphic unit 936:Chronological unit 923:Time scale(s) used 2463:Geological epochs 2453:Cambrian Series 2 2440: 2439: 2338: 2337: 2304:Paleoproterozoic 2223: 2222: 2169:Late (444–458 Ma) 2102:Late (359–383 Ma) 2015: 2014: 1997:Late (201–237 Ma) 1966:Late (145–164 Ma) 1910: 1909: 1831:(present–2.58 Ma) 1819:(present–66.0 Ma) 1774: 1773: 1769: 1768: 1492:Gondwana Research 1121:into two stages: 1067:Cambrian Series 2 1064: 1063: 1046:26.0807; 108.4138 896:Usage information 877: 876: 854: 853: 829: 828: 808: 807: 788: 787: 756: 755: 728: 727: 707: 706: 686: 685: 665: 664: 645: 644: 624: 623: 604: 603: 584: 583: 22:Cambrian Series 2 2470: 2434:World portal 2432: 2431: 2421: 2420: 2383: 2347: 2307: 2276: 2273:Mesoproterozoic 2245: 2238: 2233: 2192: 2161: 2125: 2094: 2068: 2037: 2030: 2025: 1989: 1958: 1932: 1925: 1920: 1884: 1858: 1832: 1825: 1820: 1801: 1794: 1787: 1778: 1669: 1653: 1646: 1639: 1630: 1625: 1613: 1592: 1591: 1585: 1577: 1569: 1563: 1562: 1556: 1548: 1546: 1514: 1508: 1507: 1487: 1481: 1480: 1474: 1466: 1464: 1444: 1438: 1437: 1435: 1434: 1428: 1422:. Archived from 1421: 1407: 1398: 1389: 1388: 1386: 1385: 1379: 1364: 1356: 1347: 1346: 1336: 1321:Open Geosciences 1312: 1306: 1305: 1303: 1302: 1287: 1276: 1275: 1273: 1272: 1266: 1251: 1242: 1236: 1235: 1232:stratigraphy.org 1224: 1127:Cambrian Stage 4 1123:Cambrian Stage 3 1087:first appearance 1052: 1051: 1049: 1048: 1047: 1042: 1038: 1035: 1034: 1033: 1030: 1012:Wuliu-Zengjiayan 842: 837: 815: 810: 795: 790: 763: 758: 735: 730: 714: 709: 693: 688: 672: 667: 652: 647: 631: 626: 611: 606: 591: 586: 570: 565: 524: 511: 502: 493: 484: 475: 466: 453: 440: 427: 410: 391: 368: 346: 304: 270: 243: 229: 224: 219: 214: 209: 204: 199: 194: 189: 184: 179: 174: 169: 164: 159: 154: 149: 144: 139: 134: 129: 124: 119: 114: 108: 96: 33: 19: 2478: 2477: 2473: 2472: 2471: 2469: 2468: 2467: 2443: 2442: 2441: 2436: 2426: 2415: 2407: 2389: 2381: 2374: 2345: 2334: 2305: 2298: 2274: 2267: 2243: 2242:Neoproterozoic 2232:(539 Ma–2.5 Ga) 2231: 2230: 2229:Proterozoic Eon 2219: 2190: 2183: 2159: 2152: 2123: 2116: 2092: 2085: 2066: 2059: 2035: 2023: 2022: 2011: 1987: 1980: 1956: 1949: 1930: 1918: 1917: 1906: 1882: 1875: 1856: 1849: 1830: 1818: 1817: 1810: 1805: 1775: 1770: 1765: 1744: 1723: 1707: 1662: 1660:Cambrian Period 1657: 1616: 1604: 1601: 1596: 1595: 1578: 1571: 1570: 1566: 1549: 1516: 1515: 1511: 1489: 1488: 1484: 1467: 1446: 1445: 1441: 1432: 1430: 1426: 1405: 1400: 1399: 1392: 1383: 1381: 1377: 1362: 1358: 1357: 1350: 1327:(1): 999–1012. 1314: 1313: 1309: 1300: 1298: 1289: 1288: 1279: 1270: 1268: 1264: 1249: 1244: 1243: 1239: 1226: 1225: 1221: 1216: 1180:ocean chemistry 1155: 1153:Biostratigraphy 1143:trilobite zones 1115: 1099: 1045: 1043: 1039: 1036: 1031: 1028: 1026: 1024: 1023: 1022: 878: 873: 871: 850: 840: 825: 824: 813: 804: 803: 793: 784: 783: 761: 752: 751: 733: 724: 723: 712: 703: 702: 691: 682: 681: 670: 661: 660: 650: 641: 640: 629: 620: 619: 609: 600: 599: 589: 580: 579: 568: 561: 560: 556: 555: 551: 550: 546: 545: 541: 540: 536: 535: 531: 530: 526: 525: 516: 513: 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2332: 2327: 2322: 2317: 2311: 2309: 2300: 2299: 2297: 2296: 2291: 2286: 2280: 2278: 2269: 2268: 2266: 2265: 2260: 2255: 2249: 2247: 2235: 2225: 2224: 2221: 2220: 2218: 2217: 2212: 2207: 2202: 2196: 2194: 2185: 2184: 2182: 2181: 2176: 2171: 2165: 2163: 2154: 2153: 2151: 2150: 2145: 2140: 2135: 2129: 2127: 2118: 2117: 2115: 2114: 2109: 2104: 2098: 2096: 2087: 2086: 2084: 2083: 2078: 2072: 2070: 2065:Carboniferous 2061: 2060: 2058: 2057: 2052: 2047: 2041: 2039: 2027: 2017: 2016: 2013: 2012: 2010: 2009: 2004: 1999: 1993: 1991: 1982: 1981: 1979: 1978: 1973: 1968: 1962: 1960: 1951: 1950: 1948: 1947: 1942: 1936: 1934: 1922: 1912: 1911: 1908: 1907: 1905: 1904: 1899: 1894: 1888: 1886: 1883:(23.0–66.0 Ma) 1877: 1876: 1874: 1873: 1868: 1862: 1860: 1857:(2.58–23.0 Ma) 1851: 1850: 1848: 1847: 1842: 1836: 1834: 1822: 1812: 1811: 1806: 1804: 1803: 1796: 1789: 1781: 1772: 1771: 1767: 1766: 1764: 1763: 1758: 1753: 1747: 1745: 1743: 1742: 1737: 1732: 1726: 1724: 1722: 1721: 1716: 1710: 1708: 1706: 1705: 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2193: 2186: 2180: 2177: 2175: 2172: 2170: 2167: 2166: 2164: 2162: 2155: 2149: 2146: 2144: 2141: 2139: 2136: 2134: 2131: 2130: 2128: 2126: 2119: 2113: 2110: 2108: 2105: 2103: 2100: 2099: 2097: 2095: 2088: 2082: 2079: 2077: 2074: 2073: 2071: 2069: 2062: 2056: 2053: 2051: 2048: 2046: 2043: 2042: 2040: 2038: 2031: 2028: 2026: 2021:Paleozoic Era 2018: 2008: 2005: 2003: 2000: 1998: 1995: 1994: 1992: 1990: 1983: 1977: 1974: 1972: 1969: 1967: 1964: 1963: 1961: 1959: 1952: 1946: 1943: 1941: 1938: 1937: 1935: 1933: 1931:(66.0–145 Ma) 1926: 1923: 1921: 1919:(66.0–252 Ma) 1913: 1903: 1900: 1898: 1895: 1893: 1890: 1889: 1887: 1885: 1878: 1872: 1869: 1867: 1864: 1863: 1861: 1859: 1852: 1846: 1843: 1841: 1838: 1837: 1835: 1833: 1826: 1823: 1821: 1813: 1809: 1802: 1797: 1795: 1790: 1788: 1783: 1782: 1779: 1762: 1759: 1757: 1754: 1752: 1749: 1748: 1746: 1741: 1738: 1736: 1733: 1731: 1728: 1727: 1725: 1720: 1717: 1715: 1712: 1711: 1709: 1704: 1701: 1699: 1696: 1695: 1693: 1692: 1689: 1686: 1684: 1681: 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Changes in 1177: 1172: 1170: 1166: 1165: 1160: 1152: 1150: 1146: 1144: 1140: 1136: 1132: 1128: 1124: 1120: 1112: 1110: 1108: 1104: 1096: 1094: 1092: 1088: 1084: 1080: 1076: 1072: 1068: 1059: 1055: 1050: 1021: 1017: 1013: 1010: 1006: 1002: 1001: 996: 992: 988: 984: 981: 977: 974: 970: 966: 962: 958: 954: 951: 948: 944: 941: 938: 934: 929: 925: 921: 917: 913: 909: 906: 903: 899: 894: 890: 886: 881: 870: 869:, as of 2022. 868: 861: 857: 849: 844: 839: 838: 834: 822: 817: 812: 811: 802: 797: 792: 791: 782: 779: 775: 771: 765: 760: 759: 750: 749:archaeocyatha 746: 742: 737: 732: 731: 722: 716: 711: 710: 700: 695: 690: 689: 679: 678:Sirius Passet 674: 669: 668: 659: 658:Emu Bay Shale 654: 649: 648: 638: 637:Archaeocyatha 633: 628: 627: 618: 613: 608: 607: 598: 597:Burgess Shale 593: 588: 587: 577: 572: 567: 566: 563: 522: 521: 510: 501: 492: 483: 474: 464: 463: 451: 450: 438: 437: 425: 417: 409: 390: 367: 343: 313: 312: 303: 302: 279: 278: 269: 268: 242: 241: 232: 110: 109: 104: 99: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 38: 32: 25: 20: 2408: 2344:Archean Eon 2306:(1.6–2.5 Ga) 2209: 2191:(485–539 Ma) 2160:(444–485 Ma) 2124:(419–444 Ma) 2093:(359–419 Ma) 2067:(299–359 Ma) 2036:(252–299 Ma) 2024:(252–539 Ma) 1988:(201–252 Ma) 1957:(145–201 Ma) 1916:Mesozoic Era 1816:Cenozoic Era 1756:Jiangshanian 1677: 1673:Terreneuvian 1567: 1553:cite journal 1529:(1): 17392. 1526: 1522: 1512: 1495: 1491: 1485: 1471:cite journal 1452: 1442: 1431:. Retrieved 1424:the original 1409: 1382:. Retrieved 1375:the original 1370: 1366: 1324: 1320: 1310: 1299:. Retrieved 1269:. Retrieved 1257: 1253: 1240: 1231: 1222: 1203: 1199: 1192:Redlichiidae 1188:Ollenellidae 1173: 1168: 1162: 1156: 1147: 1116: 1113:Subdivisions 1100: 1075:Terreneuvian 1066: 1065: 998: 864: 518: 509:Jiangshanian 460: 447: 434: 352: 309: 285: 275: 249: 236: 2380:Hadean Eon 2158:Ordovician 1929:Cretaceous 1829:Quaternary 1683:Miaolingian 1498:: 432–450. 1412:: 397–404. 1260:: 165–184. 1169:Fallotaspis 1079:Miaolingian 1044: / 1032:108Β°24β€²50β€³E 821:Dresbachian 770:halkieriids 745:brachiopods 617:Kaili biota 2447:Categories 2382:(4–4.6 Ga) 2346:(2.5–4 Ga) 2275:(1–1.6 Ga) 1881:Paleogene 1740:Guzhangian 1433:2024-04-02 1384:2024-04-02 1301:2024-04-02 1271:2024-04-02 1214:References 1204:O. indicus 1200:O. indicus 1164:Lemdadella 1159:trilobites 1131:Atdabanian 1091:trilobites 1029:26Β°04β€²51β€³N 980:Trilobites 931:Definition 823:extinction 721:Trilobites 699:Chengjiang 639:extinction 491:Guzhangian 101:Chronology 2409:See also: 2189:Cambrian 2122:Silurian 2091:Devonian 1986:Triassic 1955:Jurassic 1698:Fortunian 1688:Furongian 1343:2391-5447 1196:Laurentia 1176:Paleozoic 883:Etymology 424:Fortunian 277:Ediacaran 2034:Permian 1855:Neogene 1761:Stage 10 1678:Series 2 1622:Archived 1610:Archived 1582:cite web 1367:Episodes 1295:Archived 1262:Archived 1254:Episodes 1139:Toyonian 1135:Botomian 1107:Cambrian 1071:Cambrian 914:Global ( 891:Informal 778:hyoliths 774:mollusсs 520:Stage 10 1751:Paibian 1735:Drumian 1730:Wuliuan 1719:Stage 4 1714:Stage 3 1703:Stage 2 1544:6874646 1016:Guizhou 997:FAD of 841:  814:← 794:← 762:← 734:← 713:← 692:← 671:← 651:← 630:← 610:← 590:← 569:← 500:Paibian 482:Drumian 473:Wuliuan 462:Stage 4 449:Stage 3 436:Stage 2 416:Early O 228:– 218:– 208:– 198:– 188:– 178:– 168:– 158:– 148:– 138:– 128:– 118:– 2388:  1541:  1341:  1210:data. 1171:zone. 1097:Naming 959:Formal 950:Series 846:Major 768:First 747:& 719:First 576:Orsten 559:  554:  549:  544:  539:  534:  529:  1427:(PDF) 1406:(PDF) 1378:(PDF) 1363:(PDF) 1265:(PDF) 1250:(PDF) 1020:China 940:Epoch 905:Earth 701:biota 680:biota 578:Fauna 1588:link 1559:link 1477:link 1339:ISSN 1190:and 1137:and 1125:and 1101:The 1060:2018 989:None 37:Preκž’ 1539:PMC 1531:doi 1500:doi 1457:doi 1414:doi 1329:doi 1119:ICS 1089:of 978:of 976:FAD 916:ICS 867:ICS 781:SSF 741:SSF 2449:: 2404:Ga 2400:Ma 2396:ka 1608:. 1584:}} 1580:{{ 1555:}} 1551:{{ 1537:. 1525:. 1521:. 1496:28 1494:. 1473:}} 1469:{{ 1455:. 1451:. 1408:. 1393:^ 1371:31 1369:. 1365:. 1351:^ 1337:. 1325:13 1323:. 1319:. 1293:. 1280:^ 1258:42 1256:. 1252:. 1230:. 1145:. 1133:, 1018:, 1014:, 776:, 772:, 408:g. 389:g. 87:Pg 31:Ma 1800:e 1793:t 1786:v 1652:e 1645:t 1638:v 1590:) 1561:) 1547:. 1533:: 1527:9 1506:. 1502:: 1479:) 1465:. 1459:: 1436:. 1416:: 1387:. 1345:. 1331:: 1304:. 1274:. 1003:. 918:) 523:" 517:" 465:" 459:" 452:" 446:" 439:" 433:" 406:n 404:o 402:r 400:u 398:F 387:n 385:i 383:l 381:o 379:a 377:i 375:M 366:2 363:s 361:e 359:i 357:r 355:e 353:S 342:n 340:a 338:i 336:v 334:u 332:e 330:n 328:e 326:r 324:r 322:e 320:T 311:O 301:n 299:a 297:i 295:r 293:b 291:m 289:a 287:C 267:c 265:i 263:o 261:z 259:o 257:e 255:l 253:a 251:P 240:♇ 238:N 92:N 82:K 77:J 72:T 67:P 62:C 57:D 52:S 47:O 42:κž’

Index

Ma
Preκž’
κž’
O
S
D
C
P
T
J
K
Pg
N
N
♇

P
a
l
e
o
z
o
i
c

Ediacaran
C
a
m
b
r
i
a
n

O
T
e
r
r
e
n
e
u
v
i
a
n

S
e
r
i
e
s

2

M
i
a
o
l
i
n
g.

F
u
r
o
n
g.

Early O
Fortunian
Stage 2
Stage 3
Stage 4
Wuliuan
Drumian
Guzhangian

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