Knowledge

Cambrian Stage 2

Source ๐Ÿ“

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with the Zhujiaqing positive carbon isotope excursion (ZHUCE) has led to the conclusion that the combination of these two markers are a reliable indicator of the boundary between the Fortunian and Stage 2. The proposed upper boundary might be the first appearance of
1175:
Kouchinsky, Artem; Bengtson, Stefan; Missarzhevsky, Vladimir V.; Pelechaty, Shane; Torssander, Peter; Val'kov, Anatolij K. (24 September 2001). "Carbon isotope stratigraphy and the problem of a pre-Tommotian stage in Siberia".
1536:
Li, Guoxiang; Zhao, Xin; Gubanov, Alexander; Zhu, Maoyan; Na, Lin (1 April 2011). "Early Cambrian Mollusc Watsonella crosbyi: A Potential GSSP Index Fossil for the Base of the Cambrian Stage 2".
1221:"Correlation of the Cambrian Evolutionary Radiation: geochronology, evolutionary stasis of earliest Cambrian (Terreneuvian) small shelly fossil (SSF) taxa, and chronostratigraphic significance" 1783: 1497:"Proposal of the global stratotype section and point for the Laolinian Stage (=informal Cambrian Stage 2) as the upper stage of the Terreneuvian Series" 1446: 1522: 1426: 1339: 1357: 2475: 1587: 1776: 1635: 1606: 1065: 926: 877: 2535: 1370: 1769: 1269: 2468: 1442:"New U-Pb age from the Shuijingtuo Formation (Yangtze Gorges area) and its implications for the Cambrian timescale" 2554: 1064:, after the Cambrian stratigraphy of Siberia. Neither the upper nor lower boundary has yet been defined by the 1628: 1494: 2569: 2528: 2461: 1792: 1371:
Yaqin Qiang, Junfeng Guo, Guoxiang Li, Zuchen Song, Jiaxin Peng, Jie Sun, Jian Han, Zhifei Zhang (2023).
915: 1441: 1353: 1174: 2559: 1621: 2574: 2065: 2060: 2521: 1069: 1017: 811: 2564: 1583: 1516: 1420: 1377:(Mollusca) from Cambrian Stage 2 of the Three Gorges Area and Its Stratigraphic Implications" 1333: 1440:
Yang, Chuan; Bowyer, Fred T.; Condon, Daniel J.; Li, Xian-Hua; Zhu, Maoyan (15 April 2023).
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in the Zhujiaqing Formation (ๆœฑๅฎถๅบ†็ป„) in Yunnan, China or the Pestrotsvet Formation near the
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Ed Landing, Gerd Geyer, Adam C. Maloof, Martin B. Brasier, Samuel A. Bowring (2013).
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around 529 million years ago. The correlation between the lowest occurrences of
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P. Yu. Parkhaev, Yu. E. Demidenko, M. A. Kulsha (2020).
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as Index Species of the Lower Cambrian Stage Units"
1060:of the Cambrian. It is commonly referred to as the 107: 1439: 1447:Palaeogeography, Palaeoclimatology, Palaeoecology 1218: 2546: 1116:, China, was proposed for the Stage 2 in 2012. 847: 1791: 1168: 2529: 2469: 1777: 1629: 876:Subdivision of the Cambrian according to the 16:Second and last age of the Terreneuvian Epoch 1605:. International Commission on Stratigraphy. 1521:: CS1 maint: multiple names: authors list ( 1425:: CS1 maint: multiple names: authors list ( 1338:: CS1 maint: multiple names: authors list ( 1287: 1164:. International Commission on Stratigraphy. 2536: 2522: 2476: 2462: 1784: 1770: 1636: 1622: 1488: 1264: 1262: 1212: 883:Vertical axis scale: millions of years ago 1402: 1392: 1529: 1364: 1066:International Commission on Stratigraphy 1028:Upper boundary GSSP candidate section(s) 998:Lower boundary GSSP candidate section(s) 1538:Acta Geologica Sinica - English Edition 1259: 1219:Landing, E.; Kouchinsky, A. V. (2016). 2547: 1307:ะกั‚ั€ะฐั‚ะธะณั€ะฐั„ะธั. ะ“ะตะพะปะพะณะธั‡ะตัะบะฐั ะบะพั€ั€ะตะปัั†ะธั 873: 1765: 1617: 846: 2485: 2428: 1501:International Cambrian Subcommission 1484:– via Elsevier Science Direct. 1014:Upper boundary definition candidates 983:Lower boundary definition candidates 820: 800: 768: 740: 719: 698: 677: 657: 636: 616: 596: 575: 2383:= kiloannum (thousands years ago); 1643: 13: 2387:= megaannum (millions years ago); 1603:"GSSPs - The Cambrian System 2019" 14: 2586: 2391:= gigaannum (billions years ago). 1586:. Geologic Timescale Foundation. 1576: 2489: 2432: 2412: 2401: 1609:from the original on 2023-07-21. 1558:10.1111/j.1755-6724.2011.00400.x 1360:from the original on 2023-09-26. 1328:from the original on 2024-01-30. 1128:include the first appearance of 34: 1590:from the original on 2023-10-08 1433: 1346: 1150: 1100:around 521 million years ago. 574: 1: 1830:Pleistocene (11.7 kaโ€“2.58 Ma) 1143: 1119: 2508:. You can help Knowledge by 2497:This article related to the 2448:. You can help Knowledge by 1584:"GSSP Table - Paleozoic Era" 1468:10.1016/j.palaeo.2023.111477 1112:after the Laolin village in 7: 1793:Geological history of Earth 874: 232: 10: 2591: 2484: 2427: 2066:Mississippian (323โ€“359 Ma) 2061:Pennsylvanian (299โ€“323 Ma) 1825:Holocene (presentโ€“11.7 ka) 1319:10.31857/S0869592X20020064 1124:Possible candidates for a 2378: 2363: 2350:Paleoarchean (3.2โ€“3.6 Ga) 2327: 2287: 2256: 2225: 2212: 2200:Terreneuvian (521โ€“539 Ma) 2172: 2141: 2105: 2074: 2048: 2017: 2004: 1969: 1938: 1912: 1899: 1864: 1838: 1812: 1799: 1651: 1509:10.13140/RG.2.1.4198.1842 1245:10.1017/s0016756815001089 1198:10.1017/S0016756801005684 1103: 1052:Series. It lies atop the 1027: 1013: 1006:Upper boundary definition 1005: 997: 982: 975:Lower boundary definition 974: 966: 956: 946: 941: 933: 921: 911: 906: 898: 893: 869: 105: 100: 26: 21: 2345:Mesoarchean (2.8โ€“3.2 Ga) 2190:Miaolingian (497โ€“509 Ma) 2035:Guadalupian (260โ€“272 Ma) 1887:Paleocene (56.0โ€“66.0 Ma) 1877:Oligocene (23.0โ€“33.9 Ma) 110: 2340:Neoarchean (2.5โ€“2.8 Ga) 2305:Orosirian (1.8โ€“2.05 Ga) 2300:Statherian (1.6โ€“1.8 Ga) 2243:Cryogenian (635โ€“720 Ma) 2133:Llandovery (433โ€“444 Ma) 2040:Cisuralian (272โ€“299 Ma) 1851:Pliocene (2.59โ€“5.33 Ma) 1394:10.3390/biology12020261 1375:Aldanella attleborensis 1084:Aldanella attleborensis 754: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 — 2555:Cambrian geochronology 2310:Rhyacian (2.05โ€“2.3 Ga) 2279:Calymmian (1.4โ€“1.6 Ga) 2238:Ediacaran (539โ€“635 Ma) 2185:Furongian (485โ€“497 Ma) 2030:Lopingian (252โ€“260 Ma) 1856:Miocene (5.33โ€“23.0 Ma) 812:Baykonurian glaciation 2315:Siderian (2.3โ€“2.5 Ga) 2274:Ectasian (1.2โ€“1.4 Ga) 2195:Series 2 (509โ€“521 Ma) 1882:Eocene (33.9โ€“56.0 Ma) 1272:. ICS. Archived from 1044:is the unnamed upper 2355:Eoarchean (3.6โ€“4 Ga) 2248:Tonian (720 Maโ€“1 Ga) 2128:Wenlock (427โ€“433 Ma) 2118:Pridoli (419โ€“423 Ma) 1298:Mobergella radiolata 1009:Not formally defined 986:First appearance of 978:Not formally defined 2570:Geochronology stubs 2410: • 2399: • 2397:Geologic time scale 2159:Middle (458โ€“470 Ma) 2123:Ludlow (423โ€“427 Ma) 2092:Middle (383โ€“393 Ma) 1987:Middle (237โ€“247 Ma) 1956:Middle (164โ€“174 Ma) 1550:2011AcGlS..85..309L 1460:2023PPP...61611477Y 1276:on 15 November 2012 1237:2016GeoM..153..750L 1190:2001GeoM..138..387K 1178:Geological Magazine 967:Time span formality 2408:Geology portal 2269:Stenian (1โ€“1.2 Ga) 2164:Early (470โ€“485 Ma) 2097:Early (393โ€“419 Ma) 1992:Early (247โ€“252 Ma) 1961:Early (174โ€“201 Ma) 1930:Early (100โ€“145 Ma) 1925:Late (66.0โ€“100 Ma) 1158:"Chart/Time Scale" 1130:Watsonella crosbyi 1078:Watsonella crosbyi 988:small shelly fauna 957:Stratigraphic unit 947:Chronological unit 934:Time scale(s) used 2517: 2516: 2457: 2456: 2425: 2424: 2323: 2322: 2289:Paleoproterozoic 2208: 2207: 2154:Late (444โ€“458 Ma) 2087:Late (359โ€“383 Ma) 2000: 1999: 1982:Late (201โ€“237 Ma) 1951:Late (145โ€“164 Ma) 1895: 1894: 1816:(presentโ€“2.58 Ma) 1804:(presentโ€“66.0 Ma) 1759: 1758: 1754: 1753: 1296:"Zooproblematica 1138:Siberian Platform 1035: 1034: 907:Usage information 888: 887: 865: 864: 840: 839: 819: 818: 799: 798: 767: 766: 739: 738: 718: 717: 697: 696: 676: 675: 656: 655: 635: 634: 615: 614: 595: 594: 2582: 2538: 2531: 2524: 2493: 2486: 2478: 2471: 2464: 2436: 2429: 2419:World portal 2417: 2416: 2406: 2405: 2368: 2332: 2292: 2261: 2258:Mesoproterozoic 2230: 2223: 2222: 2218: 2177: 2146: 2110: 2079: 2053: 2022: 2015: 2014: 2010: 1974: 1943: 1917: 1910: 1909: 1905: 1869: 1843: 1817: 1810: 1809: 1805: 1786: 1779: 1772: 1763: 1762: 1654: 1653: 1638: 1631: 1624: 1615: 1614: 1610: 1598: 1596: 1595: 1570: 1569: 1533: 1527: 1526: 1520: 1512: 1492: 1486: 1485: 1483: 1482: 1437: 1431: 1430: 1424: 1416: 1406: 1396: 1368: 1362: 1361: 1350: 1344: 1343: 1337: 1329: 1327: 1304: 1291: 1285: 1284: 1282: 1281: 1266: 1257: 1256: 1216: 1210: 1209: 1172: 1166: 1165: 1162:stratigraphy.org 1154: 1089:A. attleborensis 1070:first appearance 853: 848: 826: 821: 806: 801: 774: 769: 746: 741: 725: 720: 704: 699: 683: 678: 663: 658: 642: 637: 622: 617: 602: 597: 581: 576: 535: 526: 513: 504: 495: 486: 477: 468: 455: 442: 429: 419: 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: 22:Cambrian Stage 2 19: 18: 2590: 2589: 2585: 2584: 2583: 2581: 2580: 2579: 2560:Geological ages 2545: 2544: 2543: 2542: 2483: 2482: 2426: 2421: 2411: 2400: 2392: 2374: 2366: 2359: 2330: 2319: 2290: 2283: 2259: 2252: 2228: 2227:Neoproterozoic 2217:(539 Maโ€“2.5 Ga) 2216: 2215: 2214:Proterozoic Eon 2204: 2175: 2168: 2144: 2137: 2108: 2101: 2077: 2070: 2051: 2044: 2020: 2008: 2007: 1996: 1972: 1965: 1941: 1934: 1915: 1903: 1902: 1891: 1867: 1860: 1841: 1834: 1815: 1803: 1802: 1795: 1790: 1760: 1755: 1750: 1729: 1708: 1692: 1647: 1645:Cambrian Period 1642: 1601: 1593: 1591: 1582: 1579: 1574: 1573: 1534: 1530: 1514: 1513: 1493: 1489: 1480: 1478: 1438: 1434: 1418: 1417: 1369: 1365: 1352: 1351: 1347: 1331: 1330: 1325: 1302: 1292: 1288: 1279: 1277: 1270:"GSSP List ICS" 1268: 1267: 1260: 1217: 1213: 1173: 1169: 1156: 1155: 1151: 1146: 1122: 1106: 992:Archaeocyathids 889: 884: 882: 861: 851: 836: 835: 824: 815: 814: 804: 795: 794: 772: 763: 762: 744: 735: 734: 723: 714: 713: 702: 693: 692: 681: 672: 671: 661: 652: 651: 640: 631: 630: 620: 611: 610: 600: 591: 590: 579: 572: 571: 567: 566: 562: 561: 557: 556: 552: 551: 547: 546: 542: 541: 537: 536: 531: 528: 527: 518: 515: 514: 509: 506: 505: 500: 497: 496: 491: 488: 487: 482: 479: 478: 473: 470: 469: 460: 457: 456: 447: 444: 443: 434: 431: 430: 428: 424: 421: 420: 415: 412: 411: 407: 405: 403: 401: 399: 396: 393: 392: 388: 386: 384: 382: 380: 378: 376: 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1577:External links 1575: 1572: 1571: 1544:(2): 309โ€“319. 1528: 1487: 1432: 1363: 1345: 1309:(in Russian). 1286: 1258: 1231:(4): 750โ€“756. 1211: 1184:(4): 387โ€“396. 1167: 1148: 1147: 1145: 1142: 1121: 1118: 1105: 1102: 1033: 1032: 1029: 1025: 1024: 1015: 1011: 1010: 1007: 1003: 1002: 999: 995: 994: 984: 980: 979: 976: 972: 971: 968: 964: 963: 958: 954: 953: 948: 944: 943: 939: 938: 937:ICS Time Scale 935: 931: 930: 923: 922:Regional usage 919: 918: 913: 912:Celestial body 909: 908: 904: 903: 900: 899:Name formality 896: 895: 891: 890: 886: 885: 871: 870: 867: 866: 863: 862: 859:Glacial period 856: 854: 844: 842: 841: 838: 837: 830: 829: 827: 817: 816: 810: 809: 807: 797: 796: 778: 777: 775: 765: 764: 750: 749: 747: 737: 736: 729: 728: 726: 716: 715: 708: 707: 705: 695: 694: 687: 686: 684: 674: 673: 667: 666: 664: 654: 653: 646: 645: 643: 633: 632: 626: 625: 623: 613: 612: 606: 605: 603: 593: 592: 585: 584: 582: 573: 569: 568: 564: 563: 559: 558: 554: 553: 549: 548: 544: 543: 539: 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2272: 2270: 2267: 2266: 2264: 2262: 2255: 2249: 2246: 2244: 2241: 2239: 2236: 2235: 2233: 2231: 2229:(539 Maโ€“1 Ga) 2224: 2221: 2219: 2211: 2201: 2198: 2196: 2193: 2191: 2188: 2186: 2183: 2182: 2180: 2178: 2171: 2165: 2162: 2160: 2157: 2155: 2152: 2151: 2149: 2147: 2140: 2134: 2131: 2129: 2126: 2124: 2121: 2119: 2116: 2115: 2113: 2111: 2104: 2098: 2095: 2093: 2090: 2088: 2085: 2084: 2082: 2080: 2073: 2067: 2064: 2062: 2059: 2058: 2056: 2054: 2047: 2041: 2038: 2036: 2033: 2031: 2028: 2027: 2025: 2023: 2016: 2013: 2011: 2006:Paleozoic Era 2003: 1993: 1990: 1988: 1985: 1983: 1980: 1979: 1977: 1975: 1968: 1962: 1959: 1957: 1954: 1952: 1949: 1948: 1946: 1944: 1937: 1931: 1928: 1926: 1923: 1922: 1920: 1918: 1916:(66.0โ€“145 Ma) 1911: 1908: 1906: 1904:(66.0โ€“252 Ma) 1898: 1888: 1885: 1883: 1880: 1878: 1875: 1874: 1872: 1870: 1863: 1857: 1854: 1852: 1849: 1848: 1846: 1844: 1837: 1831: 1828: 1826: 1823: 1822: 1820: 1818: 1811: 1808: 1806: 1798: 1794: 1787: 1782: 1780: 1775: 1773: 1768: 1767: 1764: 1747: 1744: 1742: 1739: 1737: 1734: 1733: 1731: 1726: 1723: 1721: 1718: 1716: 1713: 1712: 1710: 1705: 1702: 1700: 1697: 1696: 1694: 1689: 1686: 1684: 1681: 1680: 1678: 1677: 1674: 1671: 1669: 1666: 1664: 1661: 1659: 1656: 1655: 1650: 1646: 1639: 1634: 1632: 1627: 1625: 1620: 1619: 1616: 1608: 1604: 1600: 1589: 1585: 1581: 1580: 1567: 1563: 1559: 1555: 1551: 1547: 1543: 1539: 1532: 1524: 1518: 1510: 1506: 1502: 1498: 1491: 1477: 1473: 1469: 1465: 1461: 1457: 1453: 1449: 1448: 1443: 1436: 1428: 1422: 1414: 1410: 1405: 1400: 1395: 1390: 1386: 1382: 1378: 1376: 1367: 1359: 1355: 1349: 1341: 1335: 1324: 1320: 1316: 1312: 1308: 1301: 1299: 1290: 1275: 1271: 1265: 1263: 1254: 1250: 1246: 1242: 1238: 1234: 1230: 1226: 1222: 1215: 1207: 1203: 1199: 1195: 1191: 1187: 1183: 1179: 1171: 1163: 1159: 1153: 1149: 1141: 1139: 1135: 1131: 1127: 1117: 1115: 1111: 1101: 1099: 1094: 1090: 1086: 1085: 1080: 1079: 1075: 1071: 1067: 1063: 1059: 1055: 1051: 1047: 1043: 1039: 1030: 1026: 1023: 1019: 1016: 1012: 1008: 1004: 1000: 996: 993: 989: 985: 981: 977: 973: 969: 965: 962: 959: 955: 952: 949: 945: 940: 936: 932: 928: 924: 920: 917: 914: 910: 905: 901: 897: 892: 881: 880:, as of 2022. 879: 872: 868: 860: 855: 850: 849: 845: 843: 833: 828: 823: 822: 813: 808: 803: 802: 793: 790: 786: 782: 776: 771: 770: 761: 760:archaeocyatha 757: 753: 748: 743: 742: 733: 727: 722: 721: 711: 706: 701: 700: 690: 689:Sirius Passet 685: 680: 679: 670: 669:Emu Bay Shale 665: 660: 659: 649: 648:Archaeocyatha 644: 639: 638: 629: 624: 619: 618: 609: 608:Burgess Shale 604: 599: 598: 588: 583: 578: 577: 534: 524: 523: 512: 503: 494: 485: 476: 466: 465: 453: 452: 440: 439: 427: 418: 409: 390: 367: 343: 313: 312: 303: 302: 279: 278: 269: 268: 242: 241: 109: 104: 99: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 38: 32: 25: 20: 2565:Terreneuvian 2510:expanding it 2496: 2450:expanding it 2439: 2393: 2329:Archean Eon 2291:(1.6โ€“2.5 Ga) 2176:(485โ€“539 Ma) 2145:(444โ€“485 Ma) 2109:(419โ€“444 Ma) 2078:(359โ€“419 Ma) 2052:(299โ€“359 Ma) 2021:(252โ€“299 Ma) 2009:(252โ€“539 Ma) 1973:(201โ€“252 Ma) 1942:(145โ€“201 Ma) 1901:Mesozoic Era 1801:Cenozoic Era 1741:Jiangshanian 1687: 1658:Terreneuvian 1592:. Retrieved 1541: 1537: 1531: 1517:cite journal 1500: 1490: 1479:. Retrieved 1451: 1445: 1435: 1421:cite journal 1384: 1380: 1374: 1366: 1348: 1334:cite journal 1310: 1306: 1297: 1289: 1278:. Retrieved 1274:the original 1228: 1224: 1214: 1181: 1177: 1170: 1161: 1152: 1129: 1123: 1109: 1107: 1092: 1088: 1082: 1076: 1061: 1050:Terreneuvian 1037: 1036: 875: 520: 511:Jiangshanian 462: 449: 437: 436: 309: 285: 275: 249: 236: 2365:Hadean Eon 2143:Ordovician 1914:Cretaceous 1814:Quaternary 1668:Miaolingian 1387:(2): 1โ€”21. 1134:Aldan River 1110:"Laolinian" 832:Dresbachian 781:halkieriids 756:brachiopods 628:Kaili biota 533:Tremadocian 2549:Categories 2367:(4โ€“4.6 Ga) 2331:(2.5โ€“4 Ga) 2260:(1โ€“1.6 Ga) 1866:Paleogene 1725:Guzhangian 1594:2024-06-13 1481:2024-03-26 1454:: 111477. 1280:2024-03-26 1144:References 1120:Stratotype 1098:trilobites 1093:W. crosbyi 1056:and below 1022:Trilobites 942:Definition 834:extinction 732:Trilobites 710:Chengjiang 650:extinction 493:Guzhangian 101:Chronology 2394:See also: 2174:Cambrian 2107:Silurian 2076:Devonian 1971:Triassic 1940:Jurassic 1683:Fortunian 1673:Furongian 1566:129506892 1476:0031-0182 1313:(2): 34. 1253:132867265 1225:Geol. Mag 1108:The name 1062:Tommotian 1054:Fortunian 894:Etymology 426:Fortunian 277:Ediacaran 2499:Cambrian 2019:Permian 1840:Neogene 1746:Stage 10 1663:Series 2 1607:Archived 1588:Archived 1503:: 1โ€”43. 1413:36829538 1358:Archived 1323:Archived 1074:molluscs 1042:Cambrian 925:Global ( 902:Informal 789:hyoliths 785:mollusัs 522:Stage 10 1736:Paibian 1720:Drumian 1715:Wuliuan 1704:Stage 4 1699:Stage 3 1688:Stage 2 1546:Bibcode 1456:Bibcode 1404:9953005 1381:Biology 1233:Bibcode 1206:3884375 1186:Bibcode 1136:on the 1072:of the 1058:Stage 3 1048:of the 1040:of the 1038:Stage 2 852:  825:← 805:← 773:← 745:← 724:← 703:← 682:← 662:← 641:← 621:← 601:← 580:← 502:Paibian 484:Drumian 475:Wuliuan 464:Stage 4 451:Stage 3 438:Stage 2 228:– 218:– 208:– 198:– 188:– 178:– 168:– 158:– 148:– 138:– 128:– 118:– 2502:period 2373:  1564:  1474:  1411:  1401:  1251:  1204:  1114:Yunnan 1104:Naming 970:Formal 857:Major 779:First 758:& 730:First 587:Orsten 570:  565:  560:  555:  550:  545:  540:  2504:is a 2440:This 1562:S2CID 1326:(PDF) 1303:(PDF) 1249:S2CID 1202:S2CID 1046:stage 961:Stage 916:Earth 712:biota 691:biota 589:Fauna 2506:stub 2446:stub 1523:link 1472:ISSN 1427:link 1409:PMID 1340:link 1126:GSSP 1091:and 1031:None 1001:None 37:Pre๊ž’ 1554:doi 1505:doi 1464:doi 1452:616 1399:PMC 1389:doi 1315:doi 1241:doi 1229:153 1194:doi 1182:138 1081:or 1020:of 1018:FAD 990:or 951:Age 927:ICS 878:ICS 792:SSF 752:SSF 2551:: 2389:Ga 2385:Ma 2381:ka 1560:. 1552:. 1542:85 1540:. 1519:}} 1515:{{ 1499:. 1470:. 1462:. 1450:. 1444:. 1423:}} 1419:{{ 1407:. 1397:. 1385:12 1383:. 1379:. 1336:}} 1332:{{ 1321:. 1311:28 1305:. 1261:^ 1247:. 1239:. 1227:. 1223:. 1200:. 1192:. 1180:. 1160:. 1140:. 787:, 783:, 408:g. 389:g. 87:Pg 31:Ma 2537:e 2530:t 2523:v 2512:. 2477:e 2470:t 2463:v 2452:. 1785:e 1778:t 1771:v 1637:e 1630:t 1623:v 1597:. 1568:. 1556:: 1548:: 1525:) 1511:. 1507:: 1466:: 1458:: 1429:) 1415:. 1391:: 1373:" 1342:) 1317:: 1283:. 1255:. 1243:: 1235:: 1208:. 1196:: 1188:: 929:) 525:" 519:" 467:" 461:" 454:" 448:" 441:" 435:" 417:E 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:โ™‡ 238:N 92:N 82:K 77:J 72:T 67:P 62:C 57:D 52:S 47:O 42:๊ž’

Index

Ma
Pre๊ž’
๊ž’
O
S
D
C
P
T
J
K
Pg
N
N
โ™‡

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.

E
Fortunian
Stage 2
Stage 3
Stage 4
Wuliuan
Drumian
Guzhangian

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