49:
1728:
585:
1741:
599:
132:
56:
33:
363:
where Eocene coal-bearing rocks of marine and continental origin and Eocene age are exposed. On top of these rocks and toward the centre of the peninsula
Miocene and Pliocene sedimentary rocks exists. Towards the east Cretaceous sedimentary rocks crop out. The sedimentary formations defined in Arauco
560:
A three-stage model of evolution has been proposed for the Arauco Basin. First a phase of extension in the Late
Cretaceous and Paleogene. Then a basin inversion lasting from the Middle Eocene to the Miocene causing the uplift and erosion that created the âmain unconformityâ and finally a
543:
that cuts across all other formations of the basin. At present it reaches 100 metres (330 ft) above sea level in some locations and is dissected by a number of small valleys. The base of the
Ranquil Formation is the so-called âmain unconformityâ which is thought to have formed by
313:. The basin has an approximate area of 8,000 square kilometres (3,100 sq mi) and at its deeper parts the surface of its sedimentary fill reaches 200 metres (660 ft) below sea-level. The basin is interpreted as being part of an uplifted part of the
1622:
1142:
1092:
1409:
791:
Late
Cretaceous Belonostomus (Pisces, Actinopterygii, Aspidorhynchidae) from Algarrobo, Chile, with comments on aspidorhynchid paleodistribution in South America
1351:
707:
Becerra, Juan; Contreras-Reyes, Eduardo; Arriagada, César (2013). "Seismic structure and tectonics of the southern Arauco Basin, south-central Chile (~ 38°S)".
573:
under the basin that begun about 3.6 million years ago is believed to have caused the uplift of the basin plus some further tectonic inversion and contraction.
1321:
743:
1102:
854:
1627:
661:
GonzĂĄlez, Eduardo (1989). "Hydrocarbon resources of the coastal zone of Chile". In
Ericksen, G.E.; Cañas Pinochet, M.T.; Reinemund, J.A. (eds.).
1607:
347:
that have displaced the coal beds and the thin nature of these (less than one metre) mining activity in Arauco Basin has proven difficult to
901:
1617:
1592:
1770:
1775:
1612:
803:
1780:
1519:
333:
180:
48:
1577:
1567:
1597:
949:
790:
1424:
359:
The sedimentary fill has a maximum thickness of ca. 2,000 metres (6,600 ft). Parts of the basin are on land in
964:
1648:
1602:
894:
76:
811:
1429:
641:
What was previously known as Caleta Viel
Formation is now considered to be the roof of Millongue Formation.
69:
1572:
1549:
1529:
1306:
1693:
867:
776:
GarcĂa A., Floreal (1968). "EstratigrafĂa del
Terciario de Chile Central". In Ceccioni, Giovanni (ed.).
1587:
1582:
1544:
1534:
1032:
1434:
1017:
1703:
1356:
887:
1524:
1688:
1457:
1311:
1152:
755:
709:
804:"A Pliocene mega-tsunami deposit and associated features in the Ranquil Formation, southern Chile"
1765:
1499:
1215:
1162:
1062:
1713:
1027:
425:
1683:
1220:
1047:
1539:
1472:
1467:
1265:
1177:
1157:
1137:
954:
322:
204:
171:
1439:
1172:
1399:
1366:
1316:
1230:
1097:
1082:
1077:
1037:
959:
820:
718:
516:
340:
329:
273:
176:
1477:
1225:
1072:
617:
8:
1132:
570:
147:
1663:
1371:
824:
722:
1419:
1341:
1067:
1052:
924:
549:
318:
240:
1708:
1042:
343:, large-scale coal mining in Arauco Basin ended in the 1990s. Given a high density of
1414:
1346:
1336:
1205:
1147:
1117:
1112:
1107:
1012:
1002:
562:
411:
314:
298:
1381:
1361:
1331:
1275:
1270:
1260:
1245:
1240:
1187:
1167:
1057:
910:
828:
726:
622:
360:
286:
216:
111:
1698:
1404:
1326:
1255:
1250:
1210:
1182:
1127:
1122:
1087:
832:
387:
344:
939:
730:
535:
Pliocene Tubul
Formation is the oldest formation in the basin that has not been
1732:
1678:
590:
536:
306:
233:
866:. XII Congreso GeolĂłgico Chileno (in Spanish). Santiago, Chile. Archived from
679:
Mordojovich, Carlos (1981). "Sedimentary Basins of
Chilean Pacific Offshore".
1759:
1668:
1658:
1643:
1462:
1022:
1007:
612:
524:
348:
245:
221:
91:
78:
1745:
1673:
1653:
802:
Le Roux, J.P.; Nielsen, Sven N.; Kemnitz, Helga; Henriquez, Ălvaro (2008).
604:
540:
256:
663:
Geology of the Andes and its relation to hydrocarbon and mineral resources
566:
1298:
1235:
498:
490:
475:
459:
441:
436:
1727:
584:
1491:
1376:
1197:
929:
506:
404:
400:
326:
325:
and to the east it bounds metamorphic basement representing a fossil
268:
1449:
1391:
1289:
985:
934:
879:
395:
294:
249:
853:
Palma-Heldt, S.; Quinzio, L.A.; Bonilla, R.; Cisterna, K. (2009).
994:
944:
860:
en el PaleĂłgeno de la Cuenca de Arauco, RegiĂłn del BĂo-BĂo, Chile
852:
545:
419:
310:
228:
37:
Arauco Basin is located in the westernmost part of central Chile
32:
706:
681:
American
Association of Petroleum Geologists Studies in Geology
449:
801:
429:
302:
137:
486:
780:(in Spanish). Santiago de Chile: Ediorial Andrés Bello.
856:
Implicancias estratigrĂĄficas del primer registro de
580:
702:
700:
698:
696:
694:
1757:
691:
895:
795:
674:
672:
511:Massive sandstone, coal, clay-rich sandstone
771:
769:
767:
765:
763:
678:
902:
888:
669:
31:
775:
760:
660:
737:
368:Sedimentary formations of Arauco Basin
1758:
746:. CNE. Accessed on September 10. 2012.
635:
191:~8,000 km (3,100 sq mi)
883:
555:
909:
55:
13:
778:El Terciario de Chile Zona Central
756:CarbĂłn mantiene su sitial en Chile
334:Coastal Batholith of central Chile
317:. To the west it bounds an active
181:Coastal Batholith of central Chile
14:
1792:
261:
1739:
1726:
597:
583:
130:
54:
47:
354:
846:
784:
749:
654:
332:that has been intruded by the
1:
648:
833:10.1016/j.sedgeo.2007.12.002
339:Traditionally the centre of
7:
1771:Sedimentary basins of Chile
731:10.1016/j.tecto.2013.02.012
576:
10:
1797:
170:Accretionary prism of the
121:Southwestern South America
1722:
1704:Reigolil-Pirihueico Fault
1636:
1558:
1512:
1490:
1448:
1390:
1297:
1288:
1196:
993:
984:
973:
917:
515:
435:
410:
386:
372:
267:
255:
239:
227:
215:
210:
200:
195:
187:
166:
158:
153:
143:
125:
117:
107:
68:
42:
30:
23:
18:
1776:Geology of BiobĂo Region
1689:Magallanes-Fagnano Fault
1425:Nacientes del BiobĂo Fm.
628:
569:. The subduction of the
561:post-inversion phase of
529:Sandstone, conglomerate
428:, sandstone, siltstone,
1781:Coasts of BiobĂo Region
1500:Llano de Chocolate Beds
470:Sandstone, shale, coal
1694:Mocha-Villarrica Fault
1430:Nacientes del Teno Fm.
503:Marine and continental
464:Marine and continental
446:Marine and continental
321:that lies next to the
309:it is classified as a
297:-filled depression âa
290:
1520:Coastal central Chile
499:Curanilahue Formation
493:siltstone, sandstone
205:Eastern Pacific Ocean
1649:BiobĂo-AluminĂ© Fault
1618:Quebrada del Carrizo
1033:Caleta Herradura Fm.
744:Explotacion Reservas
565:in the Pliocene and
563:strike-slip faulting
517:Quiriquina Formation
341:coal mining in Chile
330:accretionary complex
305:. In the context of
177:Accretionary complex
1736: •
1684:Liquiñe-Ofqui Fault
1357:Punta del Cobre Fm.
1307:Baños del Flaco Fm.
1143:Quebrada Macusa Fm.
873:on August 18, 2016.
825:2008SedG..203..164L
812:Sedimentary Geology
723:2013Tectp.592...53B
665:. pp. 383â404.
571:Mocha Fracture Zone
548:during a period of
476:Boca Lebu Formation
442:Millongue Formation
369:
301:â in south-central
88: /
1733:Geology portal
1458:Canto del Agua Fm.
1312:Cerro Colorado Fm.
925:Arequipa-Antofalla
556:Tectonic evolution
550:tectonic inversion
525:Late Maastrichtian
460:Trihueco Formation
367:
319:accretionary prism
1753:
1752:
1593:Cordillera Darwin
1508:
1507:
1486:
1485:
1435:Pan de AzĂșcar Fm.
1284:
1283:
1216:Caleta Chonos Fm.
1163:Santo Domingo Fm.
1063:Cola de Zorro Fm.
1018:BahĂa Inglesa Fm.
618:Cura-MallĂn Basin
539:. It lies on an
533:
532:
454:Shale, siltstone
412:Ranquil Formation
345:geological faults
315:continental shelf
299:sedimentary basin
279:
278:
92:37.083°S 73.167°W
1788:
1746:Chile portal
1744:
1743:
1742:
1731:
1730:
1664:El ArrayĂĄn Fault
1628:Tierra del Fuego
1545:South Patagonian
1535:North Patagonian
1295:
1294:
1028:Caleta Godoy Fm.
991:
990:
982:
981:
911:Geology of Chile
904:
897:
890:
881:
880:
875:
874:
872:
865:
850:
844:
843:
841:
839:
808:
799:
793:
788:
782:
781:
773:
758:
753:
747:
741:
735:
734:
704:
689:
688:
676:
667:
666:
658:
642:
639:
623:Magallanes Basin
607:
602:
601:
600:
593:
588:
587:
370:
366:
361:Arauco Peninsula
291:Cuenca de Arauco
179:intruded by the
136:
134:
133:
112:Arauco Peninsula
103:
102:
100:
99:
98:
97:-37.083; -73.167
93:
89:
86:
85:
84:
81:
58:
57:
51:
35:
25:Cuenca de Arauco
16:
15:
1796:
1795:
1791:
1790:
1789:
1787:
1786:
1785:
1756:
1755:
1754:
1749:
1740:
1738:
1725:
1718:
1714:Valeriano Fault
1709:San RamĂłn Fault
1699:Pichilemu Fault
1632:
1613:Punta de Choros
1560:
1554:
1550:Vicuña Mackenna
1530:Futrono-Riñihue
1504:
1482:
1473:Santa Juana Fm.
1468:Panguipulli Fm.
1444:
1386:
1322:Chañarcillo Gp.
1280:
1226:Cura-MallĂn Gp.
1192:
1178:Trapa-Trapa Fm.
1073:Cura-MallĂn Gp.
977:
975:
969:
913:
908:
878:
870:
863:
851:
847:
837:
835:
806:
800:
796:
789:
785:
774:
761:
754:
750:
742:
738:
705:
692:
677:
670:
659:
655:
651:
646:
645:
640:
636:
631:
603:
598:
596:
589:
582:
579:
558:
388:Tubul Formation
364:Basin include:
357:
307:plate tectonics
175:
154:Characteristics
131:
129:
96:
94:
90:
87:
82:
79:
77:
75:
74:
64:
63:
62:
61:
60:
59:
38:
12:
11:
5:
1794:
1784:
1783:
1778:
1773:
1768:
1766:Forearc basins
1751:
1750:
1723:
1720:
1719:
1717:
1716:
1711:
1706:
1701:
1696:
1691:
1686:
1681:
1679:Lanalhue Fault
1676:
1671:
1666:
1661:
1656:
1651:
1646:
1640:
1638:
1634:
1633:
1631:
1630:
1625:
1620:
1615:
1610:
1605:
1600:
1595:
1590:
1585:
1580:
1575:
1570:
1564:
1562:
1556:
1555:
1553:
1552:
1547:
1542:
1537:
1532:
1527:
1522:
1516:
1514:
1510:
1509:
1506:
1505:
1503:
1502:
1496:
1494:
1488:
1487:
1484:
1483:
1481:
1480:
1475:
1470:
1465:
1460:
1454:
1452:
1446:
1445:
1443:
1442:
1437:
1432:
1427:
1422:
1417:
1412:
1407:
1402:
1400:Chacarilla Fm.
1396:
1394:
1388:
1387:
1385:
1384:
1379:
1374:
1369:
1367:Quiriquina Fm.
1364:
1362:Purilactis Gp.
1359:
1354:
1349:
1344:
1339:
1334:
1332:Divisadero Gp.
1329:
1324:
1319:
1317:Chacarilla Fm.
1314:
1309:
1303:
1301:
1292:
1286:
1285:
1282:
1281:
1279:
1278:
1273:
1268:
1266:Pupunahue Beds
1263:
1261:Purilactis Gp.
1258:
1253:
1248:
1243:
1238:
1233:
1231:La Cascada Fm.
1228:
1223:
1218:
1213:
1208:
1202:
1200:
1194:
1193:
1191:
1190:
1185:
1180:
1175:
1170:
1165:
1160:
1158:San Pedro Beds
1155:
1150:
1145:
1140:
1138:Pupunahue Beds
1135:
1130:
1125:
1120:
1115:
1110:
1105:
1100:
1098:La Portada Fm.
1095:
1093:La Montaña Fm.
1090:
1085:
1083:La Cascada Fm.
1080:
1078:Farellones Fm.
1075:
1070:
1065:
1060:
1055:
1050:
1045:
1040:
1038:Campanario Fm.
1035:
1030:
1025:
1020:
1015:
1010:
1005:
999:
997:
988:
979:
971:
970:
968:
967:
962:
957:
952:
947:
942:
937:
932:
927:
921:
919:
915:
914:
907:
906:
899:
892:
884:
877:
876:
845:
819:(1): 164â180.
794:
783:
759:
748:
736:
710:Tectonophysics
690:
668:
652:
650:
647:
644:
643:
633:
632:
630:
627:
626:
625:
620:
615:
609:
608:
594:
591:Geology portal
578:
575:
557:
554:
531:
530:
527:
522:
519:
513:
512:
509:
504:
501:
495:
494:
484:
481:
478:
472:
471:
468:
465:
462:
456:
455:
452:
447:
444:
439:
433:
432:
423:
417:
414:
408:
407:
398:
393:
390:
384:
383:
380:
377:
374:
356:
353:
277:
276:
271:
265:
264:
259:
253:
252:
243:
237:
236:
231:
225:
224:
219:
213:
212:
208:
207:
202:
198:
197:
193:
192:
189:
185:
184:
168:
164:
163:
160:
156:
155:
151:
150:
148:BĂo BĂo Region
145:
141:
140:
127:
123:
122:
119:
115:
114:
109:
105:
104:
72:
66:
65:
53:
52:
46:
45:
44:
43:
40:
39:
36:
28:
27:
21:
20:
9:
6:
4:
3:
2:
1793:
1782:
1779:
1777:
1774:
1772:
1769:
1767:
1764:
1763:
1761:
1748:
1747:
1735:
1734:
1729:
1721:
1715:
1712:
1710:
1707:
1705:
1702:
1700:
1697:
1695:
1692:
1690:
1687:
1685:
1682:
1680:
1677:
1675:
1672:
1670:
1669:Futrono Fault
1667:
1665:
1662:
1660:
1659:Domeyko Fault
1657:
1655:
1652:
1650:
1647:
1645:
1644:Atacama Fault
1642:
1641:
1639:
1635:
1629:
1626:
1624:
1621:
1619:
1616:
1614:
1611:
1609:
1606:
1604:
1601:
1599:
1598:Eastern Andes
1596:
1594:
1591:
1589:
1586:
1584:
1581:
1579:
1576:
1574:
1571:
1569:
1566:
1565:
1563:
1557:
1551:
1548:
1546:
1543:
1541:
1538:
1536:
1533:
1531:
1528:
1526:
1523:
1521:
1518:
1517:
1515:
1511:
1501:
1498:
1497:
1495:
1493:
1489:
1479:
1476:
1474:
1471:
1469:
1466:
1464:
1461:
1459:
1456:
1455:
1453:
1451:
1447:
1441:
1438:
1436:
1433:
1431:
1428:
1426:
1423:
1421:
1418:
1416:
1413:
1411:
1408:
1406:
1405:Coihaique Gp.
1403:
1401:
1398:
1397:
1395:
1393:
1389:
1383:
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1353:
1350:
1348:
1345:
1343:
1340:
1338:
1335:
1333:
1330:
1328:
1327:Coihaique Gp.
1325:
1323:
1320:
1318:
1315:
1313:
1310:
1308:
1305:
1304:
1302:
1300:
1296:
1293:
1291:
1287:
1277:
1274:
1272:
1269:
1267:
1264:
1262:
1259:
1257:
1254:
1252:
1249:
1247:
1244:
1242:
1239:
1237:
1234:
1232:
1229:
1227:
1224:
1222:
1221:CheuquemĂł Fm.
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1203:
1201:
1199:
1195:
1189:
1186:
1184:
1181:
1179:
1176:
1174:
1171:
1169:
1166:
1164:
1161:
1159:
1156:
1154:
1153:RĂo FrĂas Fm.
1151:
1149:
1146:
1144:
1141:
1139:
1136:
1134:
1133:Puduhuapi Fm.
1131:
1129:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1109:
1106:
1104:
1101:
1099:
1096:
1094:
1091:
1089:
1086:
1084:
1081:
1079:
1076:
1074:
1071:
1069:
1066:
1064:
1061:
1059:
1056:
1054:
1051:
1049:
1048:CheuquemĂł Fm.
1046:
1044:
1043:ChaicayĂĄn Gp.
1041:
1039:
1036:
1034:
1031:
1029:
1026:
1024:
1021:
1019:
1016:
1014:
1011:
1009:
1008:Angostura Fm.
1006:
1004:
1001:
1000:
998:
996:
992:
989:
987:
983:
980:
972:
966:
963:
961:
958:
956:
955:Madre de Dios
953:
951:
948:
946:
943:
941:
938:
936:
933:
931:
928:
926:
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916:
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905:
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869:
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858:Notofagadites
857:
849:
834:
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826:
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805:
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787:
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724:
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686:
682:
675:
673:
664:
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653:
638:
634:
624:
621:
619:
616:
614:
613:Caldera Basin
611:
610:
606:
595:
592:
586:
581:
574:
572:
568:
564:
553:
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371:
365:
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331:
328:
324:
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312:
311:forearc basin
308:
304:
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296:
292:
288:
284:
275:
272:
270:
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263:
260:
258:
254:
251:
247:
246:Maastrichtian
244:
242:
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222:Forearc basin
220:
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73:
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67:
50:
41:
34:
29:
26:
22:
17:
1737:
1724:
1674:Gastre Fault
1654:Cachet Fault
1525:Elqui-LimarĂ
1440:TobĂfera Fm.
1420:La Negra Fm.
1352:Ăirehuao Fm.
1342:Hornitos Fm.
1173:Traiguén Fm.
1068:Coquimbo Fm.
1053:Cholchol Fm.
1023:Caldera Beds
868:the original
859:
855:
848:
836:. Retrieved
816:
810:
797:
786:
777:
751:
739:
714:
708:
684:
680:
662:
656:
637:
605:Chile portal
559:
541:unconformity
534:
426:Conglomerate
358:
355:Stratigraphy
338:
323:Chile trench
283:Arauco Basin
282:
280:
274:Chilean coal
262:Stratigraphy
257:Stratigraphy
172:Chile trench
24:
19:Arauco Basin
1608:Puerto Edén
1568:BahĂa Mansa
1559:Metamorphic
1540:Panguipulli
1478:TralcĂĄn Fm.
1463:Choiyoi Gp.
1415:La Liga Fm.
1347:La Liga Fm.
1337:Dorotea Fm.
1206:Abanico Fm.
1148:Ranquil Fm.
1118:Navidad Fm.
1113:Mininco Fm.
1108:Malleco Fm.
1013:Ayacara Fm.
1003:Abanico Fm.
974:Sedimentary
567:Pleistocene
376:Environment
159:On/Offshore
95: /
70:Coordinates
1760:Categories
1603:Mejillones
1513:Batholiths
1410:Ibåñez Fm.
1382:Zapata Fm.
1372:Viñita Fm.
1299:Cretaceous
1276:Vargas Fm.
1271:Temuco Fm.
1246:Lupica Fm.
1241:Loreto Fm.
1188:Vargas Fm.
1168:Temuco Fm.
1058:Chucal Fm.
978:and groups
976:formations
960:Mejillonia
687:: 732â749.
649:References
491:calcareous
437:Lebu Group
382:Lithology
217:Basin type
167:Boundaries
1561:complexes
1492:Paleozoic
1256:Parga Fm.
1251:Oxaya Fm.
1211:Azapa Fm.
1198:Paleogene
1183:Tubul Fm.
1128:Parga Fm.
1123:Oxaya Fm.
1103:Lauca Fm.
1088:Lacui Fm.
965:Patagonia
930:Chaitenia
717:: 53â66.
507:Paleocene
487:Clay-rich
422:âPliocene
405:siltstone
401:Sandstone
349:mechanize
327:Paleozoic
196:Hydrology
108:Etymology
1578:Chañaral
1450:Triassic
1392:Jurassic
1290:Mesozoic
1236:Lebu Gp.
986:Cenozoic
950:Fitz Roy
935:Chilenia
918:Terranes
838:11 April
577:See also
396:Pliocene
295:sediment
269:Field(s)
250:Pliocene
144:State(s)
118:Location
1377:Way Gp.
995:Neogene
945:Cuyania
821:Bibcode
719:Bibcode
546:erosion
420:Miocene
293:) is a
287:Spanish
229:Orogeny
211:Geology
126:Country
83:73°10âČW
80:37°05âČS
1637:Faults
1623:TrafĂșn
1588:Chonos
1583:Choapa
940:Chiloé
537:folded
521:Marine
483:Eocene
480:Marine
467:Eocene
450:Eocene
416:Marine
392:Marine
234:Andean
201:Sea(s)
135:
1573:Belén
871:(PDF)
864:(PDF)
807:(PDF)
629:Notes
430:shale
303:Chile
138:Chile
840:2016
489:and
373:Name
281:The
188:Area
162:Both
829:doi
817:203
727:doi
715:592
379:Age
241:Age
183:(E)
174:(W)
1762::
827:.
815:.
809:.
762:^
725:.
713:.
693:^
685:12
683:.
671:^
552:.
403:,
351:.
336:.
289::
903:e
896:t
889:v
842:.
831::
823::
733:.
729::
721::
285:(
248:-
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