1790:
1813:
1779:
917:
Kaufmann, B.; Trapp, E.; Mezger, K. (2004). "The numerical age of the Upper
Frasnian (Upper Devonian) Kellwasser horizons: A new U-Pb zircon date from Steinbruch Schmidt(Kellerwald, Germany)".
652:
952:
Algeo, T. J. (1998). "Terrestrial-marine teleconnections in the
Devonian: links between the evolution of land plants, weathering processes, and marine anoxic events".
646:
1159:
734:
818:
1854:
1152:
586:
529:
1125:
1145:
1110:"Nautiloids before and during the origin of ammonoids in a Siluro-Devonian section in the Tafilalt, Anti-Atlas, Morocco"
472:
1847:
888:"A high-precision U–Pb age constraint on the Rhynie Chert Konservat-Lagerstätte: time scale and other implications"
744:
678:
797:
Epoch. It lasted from 410.8 ± 2.8 million years ago to 407.6 ± 2.8 million years ago. It was preceded by the
869:
ancestors, which also appeared in this stage before experiencing evolutionary radiations in the next stage.
1883:
1840:
1168:
575:
476:
1878:
1441:
1436:
334:
292:
638:
845:
979:
887:
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620:
1061:
1021:
8:
1772:
930:
513:
1570:
1534:
1121:
1109:
1044:
1873:
1664:
1539:
1508:
1305:
1056:
1016:
1001:
961:
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451:
822:
664:
1828:
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1529:
1467:
1362:
1331:
1300:
1083:
316:
30:
1789:
1824:
1783:
1602:
1472:
1367:
1336:
794:
672:
307:
1137:
903:
806:
1867:
1820:
1503:
1493:
1462:
1425:
1357:
1326:
862:
stage as it was known in
Siberian representations). They were descended from
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746:
693:
680:
610:
325:
299:
284:
61:
1794:
1725:
1575:
1498:
965:
855:
810:
790:
433:
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1720:
1589:
1565:
1410:
1205:
1043:
Yolkin, E.; Kim, A.; Weddige, K.; Talent, J.; House, M. (December 1997).
1002:"Decision on the Lochkovian-Pragian Boundary Stratotype (Lower Devonian)"
866:
723:
391:
36:
1715:
1675:
1618:
1518:
1415:
1289:
1189:
863:
851:
798:
738:
342:
81:
46:
1778:
954:
Philosophical
Transactions of the Royal Society B: Biological Sciences
858:) appeared in later parts of this stage (at the lower boundary of the
1730:
1680:
1654:
1613:
1560:
1405:
1381:
1262:
1252:
1241:
829:
384:
254:
86:
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1200:
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Parry, S. F.; Noble, S. R.; Crowley, Q. G.; Wellman, C. H. (2011).
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264:
76:
71:
56:
51:
41:
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1215:
91:
66:
1740:
1623:
1257:
814:
802:
668:
356:
885:
1042:
828:
In North
America the Pragian Stage is represented by
916:
114:
1045:"Definition of the Pragian/Emsian Stage boundary"
1865:
1167:
1848:
1153:
999:
995:
993:
528:Subdivision of the Devonian according to the
945:
1000:Chlupac, Ivo; Oliver, William (June 1989).
986:. International Commission on Stratigraphy.
910:
813:in Scotland. It is named after the city of
535:Vertical axis scale: millions of years ago.
1855:
1841:
1160:
1146:
990:
898:(4). London: Geological Society: 863–872.
1060:
1020:
1866:
1107:
525:
1141:
951:
1807:
879:
503:
485:
462:
441:
423:
1759:= kiloannum (thousands years ago);
13:
1763:= megaannum (millions years ago);
14:
1895:
1767:= gigaannum (billions years ago).
892:Journal of the Geological Society
817:. The GSSP is located within the
1811:
1788:
1777:
34:
1114:Special Papers in Palaeontology
1062:10.18814/epiiugs/1997/v20i4/005
1022:10.18814/epiiugs/1989/v12i2/014
839:
1101:
1076:
1036:
972:
422:
1:
1206:Pleistocene (11.7 ka–2.58 Ma)
872:
1827:. You can help Knowledge by
16:Second stage of the Devonian
7:
1169:Geological history of Earth
653:Latericriodus steinachensis
526:
249:
10:
1900:
1806:
1442:Mississippian (323–359 Ma)
1437:Pennsylvanian (299–323 Ma)
1201:Holocene (present–11.7 ka)
843:
805:Stage. The most important
801:Stage and followed by the
29:410.8 ± 2.8 – 407.6 ± 2.6
1754:
1739:
1726:Paleoarchean (3.2–3.6 Ga)
1703:
1663:
1632:
1601:
1588:
1576:Terreneuvian (521–539 Ma)
1548:
1517:
1481:
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1424:
1393:
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1345:
1314:
1288:
1275:
1240:
1214:
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904:10.1144/0016-76492010-043
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730:
718:Upper boundary definition
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635:Lower boundary definition
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601:
593:
581:
571:
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558:
550:
545:
112:
107:
26:
21:
1721:Mesoarchean (2.8–3.2 Ga)
1566:Miaolingian (497–509 Ma)
1411:Guadalupian (260–272 Ma)
1263:Paleocene (56.0–66.0 Ma)
1253:Oligocene (23.0–33.9 Ma)
477:Late Devonian extinction
117:
1716:Neoarchean (2.5–2.8 Ga)
1681:Orosirian (1.8–2.05 Ga)
1676:Statherian (1.6–1.8 Ga)
1619:Cryogenian (635–720 Ma)
1509:Llandovery (433–444 Ma)
1416:Cisuralian (272–299 Ma)
1227:Pliocene (2.59–5.33 Ma)
1088:Encyclopedia Britannica
240:−360 —
230:−365 —
220:−370 —
210:−375 —
200:−380 —
190:−385 —
180:−390 —
170:−395 —
160:−400 —
150:−405 —
140:−410 —
130:−415 —
120:−420 —
1686:Rhyacian (2.05–2.3 Ga)
1655:Calymmian (1.4–1.6 Ga)
1614:Ediacaran (539–635 Ma)
1561:Furongian (485–497 Ma)
1406:Lopingian (252–260 Ma)
1232:Miocene (5.33–23.0 Ma)
1108:Kröger, Björn (2009).
966:10.1098/rstb.1998.0195
919:The Journal of Geology
1691:Siderian (2.3–2.5 Ga)
1650:Ectasian (1.2–1.4 Ga)
1571:Series 2 (509–521 Ma)
1258:Eocene (33.9–56.0 Ma)
846:Category:Pragian life
724:Polygnathus kitabicus
1731:Eoarchean (3.6–4 Ga)
1624:Tonian (720 Ma–1 Ga)
1504:Wenlock (427–433 Ma)
1494:Pridoli (419–423 Ma)
984:www.stratigraphy.org
721:FAD of the conodont
647:Eognathodus sulcatus
456:Famennian glaciation
1884:Geochronology stubs
1786: •
1775: •
1773:Geologic time scale
1535:Middle (458–470 Ma)
1499:Ludlow (423–427 Ma)
1468:Middle (383–393 Ma)
1363:Middle (237–247 Ma)
1332:Middle (164–174 Ma)
931:2004JG....112..495K
776:Upper GSSP ratified
760:39.2000°N 67.3056°E
756: /
731:Upper boundary GSSP
710:Lower GSSP ratified
694:50.0147°N 14.3726°E
690: /
661:Lower boundary GSSP
627:Time span formality
1784:Geology portal
1645:Stenian (1–1.2 Ga)
1540:Early (470–485 Ma)
1473:Early (393–419 Ma)
1368:Early (247–252 Ma)
1337:Early (174–201 Ma)
1306:Early (100–145 Ma)
1301:Late (66.0–100 Ma)
980:"Chart/Time Scale"
809:of the Pragian is
617:Stratigraphic unit
607:Chronological unit
594:Time scale(s) used
497:shrubs & trees
1836:
1835:
1801:
1800:
1699:
1698:
1665:Paleoproterozoic
1584:
1583:
1530:Late (444–458 Ma)
1463:Late (359–383 Ma)
1376:
1375:
1358:Late (201–237 Ma)
1327:Late (145–164 Ma)
1271:
1270:
1192:(present–2.58 Ma)
1180:(present–66.0 Ma)
1127:978-1-405-18770-1
960:(1365): 113–130.
783:
782:
567:Usage information
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1795:World portal
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1634:Mesoproterozoic
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883:
819:Prague Formation
789:is one of three
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770:
768:
767:
766:
765:39.2000; 67.3056
761:
757:
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752:
749:
735:Zinzil'ban Gorge
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699:50.0147; 14.3726
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473:Kellwasser event
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452:Hangenberg event
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1735:
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1659:
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1604:
1603:Neoproterozoic
1593:(539 Ma–2.5 Ga)
1592:
1591:
1590:Proterozoic Eon
1580:
1551:
1544:
1520:
1513:
1484:
1477:
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1084:"Pragian stage"
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39:
28:
27:
17:
12:
11:
5:
1897:
1887:
1886:
1881:
1879:Early Devonian
1876:
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1837:
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1816:
1799:
1798:
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1501:
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1488:
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1470:
1465:
1459:
1457:
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1426:Carboniferous
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1408:
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1283:
1273:
1272:
1269:
1268:
1266:
1265:
1260:
1255:
1249:
1247:
1244:(23.0–66.0 Ma)
1238:
1237:
1235:
1234:
1229:
1223:
1221:
1218:(2.58–23.0 Ma)
1212:
1211:
1209:
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1203:
1197:
1195:
1183:
1173:
1172:
1165:
1164:
1157:
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1142:
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1100:
1075:
1055:(4): 235–240.
1035:
1015:(2): 109–114.
989:
971:
944:
939:10.1086/421077
925:(4): 495–501.
909:
877:
876:
874:
871:
841:
838:
795:Early Devonian
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597:ICS Time Scale
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582:Regional usage
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1823:article is a
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1821:geochronology
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1617:
1615:
1612:
1611:
1609:
1607:
1605:(539 Ma–1 Ga)
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1587:
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1574:
1572:
1569:
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1564:
1562:
1559:
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1414:
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1409:
1407:
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1387:
1382:Paleozoic Era
1379:
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1307:
1304:
1302:
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1296:
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1292:(66.0–145 Ma)
1287:
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1280:(66.0–252 Ma)
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1199:
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1829:expanding it
1818:
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1769:
1705:Archean Eon
1667:(1.6–2.5 Ga)
1552:(485–539 Ma)
1521:(444–485 Ma)
1485:(419–444 Ma)
1454:(359–419 Ma)
1428:(299–359 Ma)
1397:(252–299 Ma)
1385:(252–539 Ma)
1349:(201–252 Ma)
1318:(145–201 Ma)
1277:Mesozoic Era
1177:Cenozoic Era
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1741:Hadean Eon
1519:Ordovician
1290:Cretaceous
1190:Quaternary
1068:18 December
1028:18 December
844:Main page:
834:Deerparkian
807:Lagerstätte
763: /
697: /
1868:Categories
1743:(4–4.6 Ga)
1707:(2.5–4 Ga)
1636:(1–1.6 Ga)
1242:Paleogene
873:References
864:bactritoid
860:Zlichovian
850:The first
825:, Prague.
799:Lochkovian
751:67°18′20″E
748:39°12′00″N
739:Uzbekistan
685:14°22′21″E
682:50°00′53″N
655:Morph beta
602:Definition
495:Widespread
343:Lochkovian
108:Chronology
1770:See also:
1550:Cambrian
1483:Silurian
1452:Devonian
1347:Triassic
1316:Jurassic
1093:2 October
867:nautiloid
852:ammonoids
830:Siegenian
643:conodonts
546:Etymology
385:Famennian
255:Paleozoic
1395:Permian
1216:Neogene
1049:Episodes
1009:Episodes
667:quarry,
585:Global (
392:Tournai.
378:Frasnian
371:Givetian
364:Eifelian
275:Devonian
1874:Pragian
927:Bibcode
854:(order
793:in the
787:Pragian
641:of the
508:←
490:←
467:←
446:←
428:←
350:Pragian
300:Přídolí
245:–
235:–
225:–
215:–
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125:–
98:↓
22:Pragian
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836:time.
815:Prague
803:Emsian
669:Prague
630:Formal
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357:Emsian
1819:This
1005:(PDF)
621:Stage
576:Earth
308:Early
1825:stub
1122:ISBN
1095:2019
1070:2020
1030:2020
785:The
779:1995
713:1989
650:and
562:1985
326:Late
37:PreꞒ
1057:doi
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821:at
639:FAD
611:Age
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317:Mid
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1757:ka
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