Knowledge (XXG)

Geology of Uruguay

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in small areas of Southeastern Uruguay. Although volcanic rocks of the Paraná volcanism underlies more than half of Uruguay, they have in many areas been covered by younger sediments so that the lavas only crop out as a geological province in the Uruguayan northwest.
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Mazzucchelli, Maurizio; Rivalenti, Giorgio; Piccirillo, Enzo Michele; Vitorio Girardi, Vicente Antonio; Civetta, Lucia; Petrini, Riccardo (1995). "Petrology of the Proterozoic mafic dyke swarms of Uruguay and constraints on their mantle source composition".
173:. Though the RĂ­o de la Plata Craton underlies practically all of Uruguay, it only shows up in the south and east of the country since in other parts of the country, it is covered by younger volcanic rocks or sediments. The shield was formed during two 687:
Perea, Daniel; Soto, MatĂ­as; Veroslavsky, Gerardo; MartĂ­nez, Sergio; Ubilla, MartĂ­n (2009), "A Late Jurassic fossil assemblage in Gondwana: Biostratigraphy and correlations of the TacuarembĂł Formation, Parana Basin, Uruguay",
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rocks which are the oldest rocks in Uruguay. It has not been established to which degree this terrane belongs to or has affinity with the RĂ­o de la Plata Craton. The rocks of Nico PĂ©rez Terrane formed originally in the
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suffered a gentle uplifting that deviated sediments into the TacuarembĂł region of Uruguay. These changes led to the formation of the ItacuanbĂş and TacuarembĂł formations during the Mid
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Stewart, Kathy; Turner, Simon; Kelley, Simon; Hawkesworth, Chris; Kirstein, Linda; Mantovani, Marta (1996), "3-D,Ar-Ar geochronology in the Paraná continental flood basalt province",
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age are found in the central part of Uruguay being exposed as a narrow east-west to northeast oriented band. The upper and better known part of this
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Bossi, Jorge; Gaucher, Claudio (2004), "The Cuchilla Dionisio Terrane, Uruguay: An Allochthonous Block Accreted in the Cambrian to SW-Gondwana",
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Gaucher, C.; Finney, S. C.; Poiré, D. G.; Valencia, V. A.; Grove, M.; Blanco, G.; Pamoukaghlián, K.; Peral, L. G. (2008).
1536: 1451: 1123: 816: 562: 396: 181:(mya) for the western part and another 700–500 mya for the eastern part. The later orogenic event is the result of the 1918: 1693: 1456: 1308: 1211: 1052: 1830: 1755: 1705: 1541: 1367: 1027: 1593: 1495: 1387: 1377: 1347: 1340: 1313: 216: 151: 136: 1624: 1578: 1505: 1240: 938: 847: 839: 614: 1745: 1720: 1715: 1710: 1629: 1551: 1531: 1480: 1116: 1087: 987: 374: 267: 613:
Sánchez Bettucci, Leda; Cordani, Umberto; Loureiro, Judith; Peel, Elena; Fort, Santiago; Sato, Kei (2021).
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configuration the territory of Uruguay have been covered by several sedimentary formations ranging from
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Early Cretaceous Magmatic Activity in Southeast Uruguay: Trace Elements and Sr-Nd Isotopic Constraints
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From Rodinia to Western Gondwana: An approach to the Brasiliano-Pan African Cycle and orogenic collage
169:. The shield in Uruguay goes under the name of Rio Grande do Sul—Uruguay Shield and includes parts of 1815: 1810: 1805: 1760: 1679: 1485: 1475: 1446: 1431: 1296: 1097: 1092: 1067: 1037: 910: 855: 581: 481: 472: 289: 194: 739:
Lustrino, M.; Gomes, C.B; Melluso, L.; Morbidelli, L.; Muzio, R.; Ruberti, E. and Tassinari, C.C.G.
1840: 1659: 1583: 1573: 1565: 1526: 1521: 1415: 1216: 1062: 1047: 921: 900: 890: 875: 786: 182: 1869: 1845: 1780: 1669: 1607: 1500: 1436: 1325: 1248: 1151: 1042: 1007: 880: 860: 671: 663: 517: 403:
unit extending beyond Uruguay's borders into Argentina and Brazil, with parts of it now lying in
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Paraná flood basalts: Rapid extrusion hypothesis confirmed by new 40Ar/39Ar results
759: 615:"The Nico PĂ©rez terrane (Uruguay) and its archean and paleoproterozoic inheritance" 423: 390: 27: 219:. West of SarandĂ­ del YĂ­ Shear Zone the RĂ­o de la Plata Craton is intruded by the 701: 155: 144: 116: 55: 18: 1318: 1198: 1159: 412: 370: 282: 230: 202: 120: 101: 70: 633: 288:. All of the sedimentary formations covers only patches of the country since 1261: 442: 439: 400: 354:-like sediments found in Uruguay have been associated with this glaciation. 335: 327: 314:. The lower sandstones of this sequence have characteristics similar to the 311: 278: 238: 162: 808: 654:
Harrington, Horacio J. Uruguay - Handbook of South American Geology. 1956.
201:. The eastern part of the Uruguayan shield region is crossed by two major 1256: 431: 366: 339: 303: 275: 81: 518:
Shallow structure of the Continental Margin, Southern Brazil and Uruguay
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came to be preserved thanks to a unit of the Paraná traps, the Arapey
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and RĂ­o de la Plata cratons formed one plate in the west of the
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Soil, topography, climate and agro-ecological zones of Uruguay
565:, Mário da Costa Campos Neto and Reinhardt Adolfo Fuck. 1999. 778: 46:(older than 1.3 Ga) cratons in South America and Africa 334:
and was subsequently covered by ice lobes of the great
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In the north of Uruguay, volcanic materials from the
1779: 1692: 1606: 1564: 1514: 1468: 1414: 1295: 1150: 919: 846: 229:The area between SarandĂ­ del YĂ­ and Sierra Ballena 381:, that erupted 132 mya and covered the sediments. 361:stages of the South Atlantic the area of southern 205:both running roughly in north-south direction the 434:as well. Associated with this volcanism are also 758:David S. Thiede and Paulo M. Vasconcelos. 2010. 608: 606: 604: 161:underlying Uruguay and large areas of eastern 1124: 972: 824: 330:the territory of Uruguay was affected by the 84:. Big events that have shaped the geology of 8: 945:South Georgia and the South Sandwich Islands 233:–that is the Nico PĂ©rez Terrane– is made of 672:Late Paleozoic Glaciation: I, South America 1698: 1612: 1424: 1420: 1301: 1131: 1117: 1109: 979: 965: 957: 831: 817: 809: 532: 530: 296:have cleaned surfaces, creeks and shores. 632: 501: 407:on the other side of the Atlantic due to 690:Journal of South American Earth Sciences 426:. The bulk of this volcanic material is 411:. This volcanic material erupted in the 397:Paraná continental flood basalt province 250:era and much were later affected by the 458: 7: 210:SarandĂ­ del YĂ­-Piriápolis Shear Zone 716:Earth and Planetary Science Letters 189:in the aftermath of the breakup of 779:National Mining and Geology Office 80:the oldest of which date from the 14: 791:Food and Agriculture Organization 415:period during the opening of the 135:is marked as "SYSZ". To the east 1286: 796:Geological evolution of Uruguay 494:10.1016/j.precamres.2008.07.006 154:, an extensive area of stable 1: 551:10.1016/S1342-937X(05)71054-6 106:opening of the South Atlantic 728:10.1016/0012-821X(96)00132-X 702:10.1016/j.jsames.2009.03.009 595:10.1016/0301-9268(95)00014-V 563:Benjamin Bley de Brito Neves 338:that covered large parts of 150:in Uruguay includes part of 1766:Water supply and sanitation 1212:Treaty of Montevideo (1828) 803:Universidad de la RepĂşblica 419:and has been linked to the 1935: 388: 292:have not been uniform and 1863: 1701: 1615: 1427: 1423: 1304: 1284: 1241:Revolution of the Lances 998: 840:Geology of South America 217:Sierra Ballena Shear Zone 137:Sierra Ballena Shear Zone 133:SarandĂ­ del YĂ­ Shear Zone 127:in Uruguay after Gaucher 988:Stratigraphic formations 634:10.5027/andgeoV48n3-3345 42:Approximate location of 516:Butler, Louis W. 1970. 96:(mya)), the breakup of 1645:Science and technology 1207:Thirty-Three Orientals 1073:San Gregorio Formation 262:Sedimentary formations 152:RĂ­o de la Plata craton 140: 90:Transamazonian orogeny 47: 35: 1033:Fray Bentos Formation 1013:Buena Vista Formation 801:by Agronomy Faculty, 221:Late Paleoproterozoic 119: 41: 21: 1199:Cisplatina province 1165:Spanish colonization 1093:Tres Islas Formation 1088:TacuarembĂł Formation 1068:Rio Bonito Formation 582:Precambrian Research 473:Precambrian Research 375:TacuarembĂł formation 139:is marked as "SBSZ". 1249:Battle of Masoller 1048:Mangrullo Formation 486:2008PreR..167..150G 69:erupted during the 26:remnant made up of 22:Cerro BatovĂ­ is an 1919:Geology of Uruguay 1665:Telecommunications 1178:British invasions 1078:San JosĂ© Formation 1053:Mercedes Formation 1043:Libertad Formation 1023:CordobĂ©s Formation 1008:Botucatu Formation 746:2011-07-20 at the 664:Lawrence A. Frakes 252:Brasiliano orogeny 224:Florida dyke swarm 141: 54:combines areas of 52:geology of Uruguay 48: 36: 1906: 1905: 1859: 1858: 1688: 1687: 1602: 1601: 1560: 1559: 1537:Human trafficking 1457:General Assembly 1452:Foreign relations 1442:Political parties 1410: 1409: 1269:(1973–1985) 1243:(1870–1872) 1235:(1864–1870) 1227:(1864–1865) 1219:(1839–1851) 1201:(1821–1828) 1193:(1815–1820) 1180:(1806–1807) 1172:(1776–1814) 1106: 1105: 1098:YaguarĂ­ Formation 1058:Queguay Formation 1038:GuichĂłn Formation 1028:Dolores Formation 1018:Camacho Formation 1003:Asencio Formation 954: 953: 926:other territories 539:Gondwana Research 357:During the early 300:Sedimentary rocks 179:million years ago 177:events; one 2000 94:million years ago 65:with a region of 32:sedimentary rocks 1926: 1886: 1879: 1872: 1699: 1613: 1460: 1425: 1421: 1401: 1302: 1290: 1278: 1270: 1252: 1244: 1236: 1228: 1220: 1202: 1194: 1181: 1173: 1133: 1126: 1119: 1110: 1063:RaigĂłn Formation 981: 974: 967: 958: 946: 934:Falkland Islands 848:Sovereign states 833: 826: 819: 810: 800: 783: 767: 756: 750: 737: 731: 730: 711: 705: 704: 684: 678: 661: 655: 652: 646: 645: 643: 641: 636: 610: 599: 598: 575: 569: 560: 554: 553: 534: 525: 514: 508: 507: 505: 463: 421:Tristan da Cunha 332:Karoo Glaciation 316:Furnas Formation 248:Paleoproterozoic 1934: 1933: 1929: 1928: 1927: 1925: 1924: 1923: 1909: 1908: 1907: 1902: 1889: 1882: 1875: 1868: 1855: 1775: 1756:Public holidays 1684: 1650:State companies 1598: 1556: 1542:Law enforcement 1510: 1496:Nationality law 1464: 1458: 1406: 1397: 1291: 1282: 1276: 1268: 1250: 1242: 1234: 1233:Paraguayan War 1226: 1218: 1200: 1192: 1179: 1171: 1146: 1137: 1107: 1102: 1083:Sopas Formation 994: 985: 955: 950: 944: 927: 925: 915: 842: 837: 798: 781: 775: 770: 757: 753: 748:Wayback Machine 738: 734: 713: 712: 708: 686: 685: 681: 668:John C. Crowell 662: 658: 653: 649: 639: 637: 612: 611: 602: 577: 576: 572: 561: 557: 536: 535: 528: 515: 511: 465: 464: 460: 456: 409:plate tectonics 393: 387: 373:. Parts of the 326:. During the 264: 199:Adamastor Ocean 171:Southern Brazil 114: 44:Mesoproterozoic 12: 11: 5: 1932: 1930: 1922: 1921: 1911: 1910: 1904: 1903: 1901: 1900: 1895: 1888: 1887: 1880: 1873: 1865: 1864: 1861: 1860: 1857: 1856: 1854: 1853: 1848: 1843: 1838: 1833: 1828: 1823: 1818: 1813: 1808: 1803: 1802: 1801: 1791: 1785: 1783: 1777: 1776: 1774: 1773: 1768: 1763: 1758: 1753: 1748: 1743: 1738: 1733: 1728: 1723: 1718: 1713: 1708: 1702: 1696: 1690: 1689: 1686: 1685: 1683: 1682: 1677: 1672: 1667: 1662: 1657: 1652: 1647: 1642: 1637: 1632: 1627: 1622: 1616: 1610: 1604: 1603: 1600: 1599: 1597: 1596: 1591: 1586: 1581: 1576: 1570: 1568: 1562: 1561: 1558: 1557: 1555: 1554: 1549: 1544: 1539: 1534: 1529: 1524: 1518: 1516: 1512: 1511: 1509: 1508: 1503: 1498: 1493: 1488: 1483: 1478: 1472: 1470: 1466: 1465: 1463: 1462: 1454: 1449: 1444: 1439: 1434: 1428: 1418: 1412: 1411: 1408: 1407: 1405: 1404: 1403: 1402: 1390: 1385: 1383:National parks 1380: 1378:Municipalities 1375: 1370: 1365: 1360: 1355: 1350: 1348:Extreme points 1345: 1344: 1343: 1341:Climate change 1333: 1328: 1323: 1322: 1321: 1311: 1305: 1299: 1293: 1292: 1285: 1283: 1281: 1280: 1272: 1264: 1259: 1254: 1246: 1238: 1230: 1225:Uruguayan War 1222: 1214: 1209: 1204: 1196: 1188: 1186:Banda Oriental 1183: 1175: 1167: 1162: 1160:CharrĂşa people 1156: 1154: 1148: 1147: 1138: 1136: 1135: 1128: 1121: 1113: 1104: 1103: 1101: 1100: 1095: 1090: 1085: 1080: 1075: 1070: 1065: 1060: 1055: 1050: 1045: 1040: 1035: 1030: 1025: 1020: 1015: 1010: 1005: 999: 996: 995: 986: 984: 983: 976: 969: 961: 952: 951: 949: 948: 941: 936: 930: 928: 920: 917: 916: 914: 913: 908: 903: 898: 893: 888: 883: 878: 873: 868: 863: 858: 852: 850: 844: 843: 838: 836: 835: 828: 821: 813: 807: 806: 793: 784: 774: 773:External links 771: 769: 768: 751: 732: 706: 679: 656: 647: 627:(3): 442–471. 620:Andean Geology 600: 589:(3): 177–194. 570: 555: 545:(3): 661–674, 526: 509: 480:(1): 150–170. 457: 455: 452: 430:but there are 417:South Atlantic 386: 383: 344:Glacial striae 328:Late Paleozoic 310:is made up of 304:Lower Devonian 263: 260: 256:Neoproterozoic 185:of blocks and 113: 110: 13: 10: 9: 6: 4: 3: 2: 1931: 1920: 1917: 1916: 1914: 1899: 1896: 1894: 1891: 1890: 1885: 1881: 1878: 1874: 1871: 1867: 1866: 1862: 1852: 1849: 1847: 1844: 1842: 1839: 1837: 1834: 1832: 1829: 1827: 1824: 1822: 1819: 1817: 1814: 1812: 1809: 1807: 1804: 1800: 1797: 1796: 1795: 1792: 1790: 1787: 1786: 1784: 1782: 1778: 1772: 1769: 1767: 1764: 1762: 1759: 1757: 1754: 1752: 1749: 1747: 1744: 1742: 1739: 1737: 1734: 1732: 1729: 1727: 1726:Ethnic groups 1724: 1722: 1719: 1717: 1714: 1712: 1709: 1707: 1704: 1703: 1700: 1697: 1695: 1691: 1681: 1678: 1676: 1673: 1671: 1668: 1666: 1663: 1661: 1658: 1656: 1655:Stockbreeding 1653: 1651: 1648: 1646: 1643: 1641: 1638: 1636: 1633: 1631: 1628: 1626: 1623: 1621: 1618: 1617: 1614: 1611: 1609: 1605: 1595: 1592: 1590: 1587: 1585: 1582: 1580: 1577: 1575: 1572: 1571: 1569: 1567: 1563: 1553: 1550: 1548: 1545: 1543: 1540: 1538: 1535: 1533: 1530: 1528: 1525: 1523: 1520: 1519: 1517: 1513: 1507: 1506:Supreme Court 1504: 1502: 1499: 1497: 1494: 1492: 1489: 1487: 1484: 1482: 1479: 1477: 1474: 1473: 1471: 1467: 1461: 1455: 1453: 1450: 1448: 1445: 1443: 1440: 1438: 1435: 1433: 1430: 1429: 1426: 1422: 1419: 1417: 1413: 1400: 1396: 1395: 1394: 1391: 1389: 1386: 1384: 1381: 1379: 1376: 1374: 1371: 1369: 1366: 1364: 1361: 1359: 1356: 1354: 1351: 1349: 1346: 1342: 1339: 1338: 1337: 1334: 1332: 1329: 1327: 1324: 1320: 1317: 1316: 1315: 1312: 1310: 1307: 1306: 1303: 1300: 1298: 1294: 1289: 1279: 1273: 1271: 1267:Dictatorship 1265: 1263: 1260: 1258: 1255: 1253: 1247: 1245: 1239: 1237: 1231: 1229: 1223: 1221: 1215: 1213: 1210: 1208: 1205: 1203: 1197: 1195: 1191:Liga Federal 1189: 1187: 1184: 1182: 1176: 1174: 1168: 1166: 1163: 1161: 1158: 1157: 1155: 1153: 1149: 1145: 1141: 1134: 1129: 1127: 1122: 1120: 1115: 1114: 1111: 1099: 1096: 1094: 1091: 1089: 1086: 1084: 1081: 1079: 1076: 1074: 1071: 1069: 1066: 1064: 1061: 1059: 1056: 1054: 1051: 1049: 1046: 1044: 1041: 1039: 1036: 1034: 1031: 1029: 1026: 1024: 1021: 1019: 1016: 1014: 1011: 1009: 1006: 1004: 1001: 1000: 997: 993: 989: 982: 977: 975: 970: 968: 963: 962: 959: 947: 942: 940: 939:French Guiana 937: 935: 932: 931: 929: 923: 918: 912: 909: 907: 904: 902: 899: 897: 894: 892: 889: 887: 884: 882: 879: 877: 874: 872: 869: 867: 864: 862: 859: 857: 854: 853: 851: 849: 845: 841: 834: 829: 827: 822: 820: 815: 814: 811: 804: 797: 794: 792: 788: 785: 780: 777: 776: 772: 765: 761: 755: 752: 749: 745: 742: 736: 733: 729: 725: 721: 717: 710: 707: 703: 699: 695: 691: 683: 680: 677: 673: 669: 665: 660: 657: 651: 648: 635: 630: 626: 622: 621: 616: 609: 607: 605: 601: 596: 592: 588: 584: 583: 574: 571: 568: 564: 559: 556: 552: 548: 544: 540: 533: 531: 527: 523: 519: 513: 510: 504: 499: 495: 491: 487: 483: 479: 475: 474: 469: 462: 459: 453: 451: 448: 444: 441: 437: 433: 429: 425: 422: 418: 414: 410: 406: 402: 399:form a major 398: 392: 384: 382: 380: 376: 372: 368: 364: 360: 355: 353: 349: 345: 341: 337: 333: 329: 325: 321: 317: 313: 309: 305: 301: 297: 295: 291: 287: 284: 280: 277: 273: 270:of the final 269: 261: 259: 257: 253: 249: 245: 240: 236: 232: 227: 225: 222: 218: 215: 211: 208: 204: 200: 196: 195:SĂŁo Francisco 192: 188: 184: 180: 176: 172: 168: 165:and southern 164: 160: 159:basement rock 157: 153: 149: 146: 138: 134: 130: 126: 122: 118: 112:Shield region 111: 109: 107: 103: 99: 95: 91: 87: 83: 79: 76: 72: 68: 67:volcanic rock 64: 61: 57: 53: 45: 40: 33: 29: 25: 20: 16: 1884:Bibliography 1716:Demographics 1711:Coat of arms 1675:Trade unions 1630:Central Bank 1552:Prostitution 1532:Human rights 1527:Cannabis use 1515:Legal issues 1481:Constitution 1469:Legal system 1459:(parliament) 1362: 1170:Viceroyalty 922:Dependencies 905: 799:(in Spanish) 782:(in Spanish) 763: 754: 735: 719: 715: 709: 693: 689: 682: 676:GSA Bulletin 659: 650: 640:November 28, 638:. Retrieved 624: 618: 586: 580: 573: 558: 542: 538: 512: 477: 471: 461: 401:lithological 394: 391:Flood basalt 385:Paraná traps 363:Paraná Basin 356: 315: 298: 265: 228: 142: 128: 108:(~145 mya). 88:include the 73:and copious 51: 49: 28:flood basalt 15: 1741:Immigration 1620:Agriculture 1547:LGBT rights 1373:Lighthouses 1336:Environment 1331:Departments 1275:Expiry Law 503:11336/74329 445:exposed as 235:metamorphic 231:shear zones 203:shear zones 156:crystalline 145:Precambrian 121:Shear zones 75:sedimentary 56:Precambrian 1816:Literature 1736:Healthcare 1721:Emigration 1476:Civil Code 1319:Montevideo 1217:Civil War 696:(2): 168, 454:References 443:intrusions 438:and other 413:Cretaceous 389:See also: 371:Cretaceous 290:deposition 283:Quaternary 279:sandstones 266:After the 104:) and the 71:Cretaceous 30:overlying 1811:Languages 1806:Education 1761:Squatting 1680:Transport 1584:Air Force 1486:Judiciary 1447:Elections 1432:President 1297:Geography 1262:Tupamaros 911:Venezuela 856:Argentina 805:, Uruguay 524:Bulletin. 440:granitoid 432:rhyolites 369:to Early 336:ice sheet 320:SĂŁo Paulo 312:sandstone 239:granitoid 214:sinistral 183:accretion 163:Argentina 131:., 2008. 100:(700–500 24:erosional 1913:Category 1893:Category 1841:Religion 1660:Taxation 1635:Currency 1566:Military 1522:Abortion 1501:Passport 1416:Politics 1257:Batllism 1144:articles 901:Suriname 891:Paraguay 876:Colombia 744:Archived 670:. 1969. 447:outcrops 367:Jurassic 340:Gondwana 308:sequence 276:Devonian 268:assembly 246:eon and 212:and the 187:terranes 175:orogenic 125:terranes 82:Devonian 1870:Outline 1846:Smoking 1831:Museums 1794:Cuisine 1781:Culture 1694:Society 1670:Tourism 1625:Banking 1608:Economy 1589:History 1437:Cabinet 1368:Islands 1363:Geology 1326:Climate 1309:Borders 1152:History 1140:Uruguay 992:Uruguay 906:Uruguay 881:Ecuador 861:Bolivia 766:vol 38. 764:Geology 482:Bibcode 436:syenite 405:Namibia 379:basalts 359:rifting 294:erosion 244:Archean 207:dextral 191:Rodinia 98:Rodinia 86:Uruguay 1898:Portal 1789:Cinema 1751:People 1706:Anthem 1640:Energy 1388:Rivers 1314:Cities 1277:(1986) 1251:(1904) 1142:  886:Guyana 866:Brazil 722:: 95, 428:basalt 348:shales 324:Brazil 272:shield 167:Brazil 148:shield 92:(2000 78:facies 60:shield 58:-aged 1877:Index 1851:Sport 1836:Music 1826:Media 1771:Women 1594:Ranks 1358:Flora 1353:Fauna 871:Chile 424:plume 352:varve 286:loess 258:era. 193:when 129:et al 63:units 1821:Mate 1799:Wine 1746:LGBT 1731:Flag 1579:Navy 1574:Army 1393:Time 896:Peru 666:and 642:2021 350:and 237:and 143:The 123:and 50:The 1491:Law 1399:DST 990:of 924:and 789:by 724:doi 720:143 698:doi 629:doi 591:doi 547:doi 522:GSA 498:hdl 490:doi 478:167 346:on 322:in 318:of 302:of 281:to 254:in 226:. 102:mya 1915:: 762:. 718:, 694:28 692:, 674:, 625:48 623:. 617:. 603:^ 587:74 585:. 541:, 529:^ 520:. 496:. 488:. 476:. 470:. 342:. 1132:e 1125:t 1118:v 980:e 973:t 966:v 832:e 825:t 818:v 726:: 700:: 644:. 631:: 597:. 593:: 549:: 543:7 506:. 500:: 492:: 484:: 34:.

Index


erosional
flood basalt
sedimentary rocks

Mesoproterozoic
Precambrian
shield
units
volcanic rock
Cretaceous
sedimentary
facies
Devonian
Uruguay
Transamazonian orogeny
million years ago
Rodinia
mya
opening of the South Atlantic

Shear zones
terranes
SarandĂ­ del YĂ­ Shear Zone
Sierra Ballena Shear Zone
Precambrian
shield
RĂ­o de la Plata craton
crystalline
basement rock

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