Knowledge (XXG)

Río Frías Formation

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between Chile and Argentina, thus there was both a political and scientific motivation behind the exploration of Patagonia. Santiago Roth called the upper course of Río Cisnes for Río Frías being unaware that it was the same river. Further he thought this unexplored area to be in Argentina and not in
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The Alto Río Cisnes Fossil Fauna (Río Frías Formation, Early-Middle Miocene, Friasian SALMA): A keystone and paradigmatic vertebrate assemblage of the South American Fossil Record
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Río Frías Formation was discovered by Santiago Roth in the summer of 1897–98. Roth was a Swiss immigrant who had been sent to survey the area by
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period. Later research on Ar/Ar data revealed the base of the formation dating to 16.5 Ma, which means a slight overlap with the
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Chile. This led the formation to acquire its name. Roth sent fossils he collected from the formation to
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Ambientes asociados a la fauna Friasense (Mioceno Medio) en Alto río Cisnes (Aysén, Chile)
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who was active at La Plata. It was with this fossils Ameghino established the
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land mammal age (ending at 16.3 Ma). The formation was deposited in a
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The following fossils have been found in the formation:
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Abello, María Alejandra; Rubilar Rogers, David (2012),
442:, characterized by an intermontane valley flanked by 915:, III Simposio Paleontología en Chile, pp. 44–45 769: 767: 765: 2344: 2266: 2220: 2198: 2156: 2098: 2005: 1996: 1904: 1701: 1692: 1681: 1625: 1546: 1456: 1386: 1358: 1347: 1013: 313: 305: 295: 290: 280: 262: 252: 213: 174: 169: 147: 142: 132: 122: 21: 862:Ameghino, 1887 (Marsupialia, Paucituberculata)" 951:Marshall, Larry G.; Salinas, Patricia (1990), 394:fossils have been found in the formation. The 1603: 991: 8: 334: 2002: 1698: 1689: 1610: 1596: 1588: 1355: 998: 984: 976: 459: 18: 761: 471: 16:Geologic formation in western Patagonia 420:Cordillera of the Andes Boundary Case 7: 14: 2447: 2434: 1576: 1565: 1564: 1333: 1324: 1315: 1306: 1297: 1288: 1279: 1270: 1261: 1252: 1243: 1234: 1225: 1216: 1207: 1198: 1189: 1180: 1171: 1162: 1153: 1144: 1137: 333: 326: 267: 2479:Miocene Series of South America 1007:South American land mammal ages 400:South American Land Mammal Ages 402:is named after the formation. 1: 802:Bostelmann et al., 2012, p.44 2474:Geologic formations of Chile 892:Bellosi, Eduardo S. (2014), 773:Marshall & Salinas, 1990 215:Approximate paleocoordinates 2514:Austral or Magallanes Basin 342:Río Frías Formation (Chile) 2535: 1483:Divisadero Largo Formation 958:Revista Geológica de Chile 933:Revista Geológica de Chile 926:Marshall, Larry G (1990), 811:Bellosi et al., 2014, p.40 664:Microbiotherium tehuelchum 495: 476: 2430: 2412:Reigolil-Pirihueico Fault 1562: 1132: 909:Bostelmann, J.E. (2012), 676:Palaeothentes intermedius 658:Megathericulus friasensis 605: 578: 502:Prothylacinus patagonicus 482:Astrapotherium hesperinum 414:. Moreno was director of 321: 26: 2397:Magallanes-Fagnano Fault 2133:Nacientes del Biobío Fm. 1411:Arroyo Chasicó Formation 792:Paleo Database: Friasian 730:?Propalaehoplophorus sp. 670:Parabderites bicrispatus 418:and was involved in the 2519:Geology of Aysén Region 2504:Conglomerate formations 2208:Llano de Chocolate Beds 1401:Monte Hermoso Formation 880:10.5710/AMGH.v49i2(408) 162:, unconsolidated sand, 2402:Mocha-Villarrica Fault 2138:Nacientes del Teno Fm. 646:Abderites meridionalis 638: 611: 601:Cladosictis patagonica 584: 566: 548: 530: 512: 492: 387: 360: 2228:Coastal central Chile 1527:Santa Lucía Formation 1433:Collón Curá Formation 1406:Huayquerías Formation 1396:Chapadmalal Formation 858:"Revisión del género 742:Trachytypotherium sp. 637: 610: 583: 565: 547: 529: 511: 491: 2499:Siltstone formations 2357:Biobío-Aluminé Fault 2326:Quebrada del Carrizo 1741:Caleta Herradura Fm. 1443:Santa Cruz Formation 652:Alloiomys friasensis 127:Geological formation 2444: • 2392:Liquiñe-Ofqui Fault 2065:Punta del Cobre Fm. 2015:Baños del Flaco Fm. 1851:Quebrada Macusa Fm. 1515:Salamanca Formation 1500:Casamayor Formation 1488:Sarmiento Formation 1448:Colhué Huapí Member 1438:Río Frías Formation 724:Phoenixauchenia sp. 712:Sipalocyon gracilis 706:Prototrigodon rothi 694:Pichipilus halleuxi 628:Homalodotherium sp. 425:Florentino Ameghino 361:Formación Río Frías 353:Río Frías Formation 233: /  194: /  28:Stratigraphic range 22:Río Frías Formation 2441:Geology portal 2166:Canto del Agua Fm. 2020:Cerro Colorado Fm. 1633:Arequipa-Antofalla 1505:Itaboraí Formation 1476:Tinguiririca fauna 1416:Río Mayo Formation 1373:Ensenada Formation 747:Platyrrhini indet. 718:Neonematherium sp. 700:Pitheculites rothi 639: 612: 585: 574:Borhyaena tuberata 567: 556:Protypotherium sp. 549: 531: 513: 493: 368:geologic formation 137:Ñirehuao Formation 2461: 2460: 2301:Cordillera Darwin 2216: 2215: 2194: 2193: 2143:Pan de Azúcar Fm. 1992: 1991: 1924:Caleta Chonos Fm. 1871:Santo Domingo Fm. 1771:Cola de Zorro Fm. 1726:Bahía Inglesa Fm. 1585: 1584: 1542: 1541: 1471:Abanico Formation 1466:Deseado Formation 754: 753: 350: 349: 2526: 2509:Fluvial deposits 2454:Chile portal 2452: 2451: 2450: 2439: 2438: 2372:El Arrayán Fault 2336:Tierra del Fuego 2253:South Patagonian 2243:North Patagonian 2003: 1736:Caleta Godoy Fm. 1699: 1690: 1619:Geology of Chile 1612: 1605: 1598: 1589: 1580: 1568: 1567: 1356: 1337: 1328: 1319: 1310: 1301: 1292: 1283: 1274: 1265: 1256: 1247: 1238: 1229: 1220: 1211: 1202: 1193: 1184: 1175: 1166: 1157: 1148: 1141: 1000: 993: 986: 977: 972: 971: 970: 947: 946: 945: 922: 921: 920: 905: 904: 903: 888: 887: 886: 844: 834: 828: 818: 812: 809: 803: 800: 794: 789: 783: 780: 774: 771: 520:Adinotherium sp. 460: 412:Francisco Moreno 372:sedimentary rock 337: 336: 330: 273: 271: 270: 248: 247: 245: 244: 243: 238: 234: 231: 230: 229: 226: 209: 208: 206: 205: 204: 199: 195: 192: 191: 190: 187: 118: 48: 19: 2534: 2533: 2529: 2528: 2527: 2525: 2524: 2523: 2494:Tuff formations 2464: 2463: 2462: 2457: 2448: 2446: 2433: 2426: 2422:Valeriano Fault 2417:San Ramón Fault 2407:Pichilemu Fault 2340: 2321:Punta de Choros 2268: 2262: 2258:Vicuña Mackenna 2238:Futrono-Riñihue 2212: 2190: 2181:Santa Juana Fm. 2176:Panguipulli Fm. 2152: 2094: 2030:Chañarcillo Gp. 1988: 1934:Cura-Mallín Gp. 1900: 1886:Trapa-Trapa Fm. 1781:Cura-Mallín Gp. 1685: 1683: 1677: 1621: 1616: 1586: 1581: 1558: 1538: 1510:Río Chico Group 1452: 1382: 1378:Uquía Formation 1368:Luján Formation 1351: 1349: 1343: 1342: 1341: 1340: 1339: 1338: 1330: 1329: 1321: 1320: 1312: 1311: 1303: 1302: 1294: 1293: 1285: 1284: 1276: 1275: 1267: 1266: 1258: 1257: 1249: 1248: 1240: 1239: 1231: 1230: 1222: 1221: 1213: 1212: 1204: 1203: 1195: 1194: 1186: 1185: 1177: 1176: 1168: 1167: 1159: 1158: 1150: 1149: 1130: 1009: 1004: 968: 966: 950: 943: 941: 925: 918: 916: 908: 901: 899: 891: 884: 882: 855: 852: 847: 837:Alto Río Cisnes 835: 831: 819: 815: 810: 806: 801: 797: 790: 786: 781: 777: 772: 763: 759: 619:Pachyrukhos sp. 455: 416:La Plata Museum 408: 346: 345: 344: 343: 340: 339: 338: 268: 266: 241: 239: 235: 232: 227: 224: 222: 220: 219: 202: 200: 196: 193: 188: 185: 183: 181: 180: 117: 116: 115: 114: 109: 104: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 44:16.5–15.5  43: 42: 40: 34: 17: 12: 11: 5: 2532: 2530: 2522: 2521: 2516: 2511: 2506: 2501: 2496: 2491: 2486: 2481: 2476: 2466: 2465: 2459: 2458: 2431: 2428: 2427: 2425: 2424: 2419: 2414: 2409: 2404: 2399: 2394: 2389: 2387:Lanalhue Fault 2384: 2379: 2374: 2369: 2364: 2359: 2354: 2348: 2346: 2342: 2341: 2339: 2338: 2333: 2328: 2323: 2318: 2313: 2308: 2303: 2298: 2293: 2288: 2283: 2278: 2272: 2270: 2264: 2263: 2261: 2260: 2255: 2250: 2245: 2240: 2235: 2230: 2224: 2222: 2218: 2217: 2214: 2213: 2211: 2210: 2204: 2202: 2196: 2195: 2192: 2191: 2189: 2188: 2183: 2178: 2173: 2168: 2162: 2160: 2154: 2153: 2151: 2150: 2145: 2140: 2135: 2130: 2125: 2120: 2115: 2110: 2108:Chacarilla Fm. 2104: 2102: 2096: 2095: 2093: 2092: 2087: 2082: 2077: 2075:Quiriquina Fm. 2072: 2070:Purilactis Gp. 2067: 2062: 2057: 2052: 2047: 2042: 2040:Divisadero Gp. 2037: 2032: 2027: 2025:Chacarilla Fm. 2022: 2017: 2011: 2009: 2000: 1994: 1993: 1990: 1989: 1987: 1986: 1981: 1976: 1974:Pupunahue Beds 1971: 1969:Purilactis Gp. 1966: 1961: 1956: 1951: 1946: 1941: 1939:La Cascada Fm. 1936: 1931: 1926: 1921: 1916: 1910: 1908: 1902: 1901: 1899: 1898: 1893: 1888: 1883: 1878: 1873: 1868: 1866:San Pedro Beds 1863: 1858: 1853: 1848: 1846:Pupunahue Beds 1843: 1838: 1833: 1828: 1823: 1818: 1813: 1808: 1806:La Portada Fm. 1803: 1801:La Montaña Fm. 1798: 1793: 1791:La Cascada Fm. 1788: 1786:Farellones Fm. 1783: 1778: 1773: 1768: 1763: 1758: 1753: 1748: 1746:Campanario Fm. 1743: 1738: 1733: 1728: 1723: 1718: 1713: 1707: 1705: 1696: 1687: 1679: 1678: 1676: 1675: 1670: 1665: 1660: 1655: 1650: 1645: 1640: 1635: 1629: 1627: 1623: 1622: 1617: 1615: 1614: 1607: 1600: 1592: 1583: 1582: 1563: 1560: 1559: 1557: 1556: 1550: 1548: 1544: 1543: 1540: 1539: 1537: 1536: 1535: 1534: 1532:Tiupampa fauna 1524: 1523: 1522: 1512: 1507: 1502: 1497: 1496: 1495: 1485: 1480: 1479: 1478: 1468: 1462: 1460: 1454: 1453: 1451: 1450: 1445: 1440: 1435: 1430: 1429: 1428: 1426:La Venta fauna 1418: 1413: 1408: 1403: 1398: 1392: 1390: 1384: 1383: 1381: 1380: 1375: 1370: 1364: 1362: 1353: 1345: 1344: 1332: 1331: 1323: 1322: 1314: 1313: 1305: 1304: 1296: 1295: 1287: 1286: 1278: 1277: 1269: 1268: 1260: 1259: 1251: 1250: 1242: 1241: 1233: 1232: 1224: 1223: 1215: 1214: 1206: 1205: 1197: 1196: 1188: 1187: 1179: 1178: 1170: 1169: 1161: 1160: 1152: 1151: 1143: 1142: 1136: 1135: 1134: 1133: 1131: 1129: 1128: 1123: 1118: 1113: 1108: 1103: 1098: 1093: 1088: 1083: 1078: 1073: 1068: 1063: 1058: 1053: 1048: 1043: 1038: 1033: 1028: 1023: 1017: 1015: 1011: 1010: 1005: 1003: 1002: 995: 988: 980: 974: 973: 948: 923: 906: 889: 874:(2): 164–184, 851: 848: 846: 845: 829: 813: 804: 795: 784: 782:Marshall, 1990 775: 760: 758: 755: 752: 751: 749: 736:Prozaedyus sp. 641: 640: 631: 623: 622: 614: 613: 604: 596: 595: 587: 586: 577: 569: 568: 559: 551: 550: 541: 533: 532: 523: 515: 514: 505: 497: 496: 494: 485: 478: 474: 473: 470: 467: 464: 454: 453:Fossil content 451: 407: 404: 398:period in the 365:Middle Miocene 348: 347: 341: 332: 331: 325: 324: 323: 322: 319: 318: 315: 311: 310: 307: 303: 302: 297: 293: 292: 288: 287: 282: 278: 277: 264: 260: 259: 254: 250: 249: 217: 211: 210: 178: 172: 171: 167: 166: 149: 145: 144: 140: 139: 134: 130: 129: 124: 120: 119: 112: 111: 110: 105: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 49: 32:Middle Miocene 24: 23: 15: 13: 10: 9: 6: 4: 3: 2: 2531: 2520: 2517: 2515: 2512: 2510: 2507: 2505: 2502: 2500: 2497: 2495: 2492: 2490: 2487: 2485: 2484:Neogene Chile 2482: 2480: 2477: 2475: 2472: 2471: 2469: 2456: 2455: 2443: 2442: 2437: 2429: 2423: 2420: 2418: 2415: 2413: 2410: 2408: 2405: 2403: 2400: 2398: 2395: 2393: 2390: 2388: 2385: 2383: 2380: 2378: 2377:Futrono Fault 2375: 2373: 2370: 2368: 2367:Domeyko Fault 2365: 2363: 2360: 2358: 2355: 2353: 2352:Atacama Fault 2350: 2349: 2347: 2343: 2337: 2334: 2332: 2329: 2327: 2324: 2322: 2319: 2317: 2314: 2312: 2309: 2307: 2306:Eastern Andes 2304: 2302: 2299: 2297: 2294: 2292: 2289: 2287: 2284: 2282: 2279: 2277: 2274: 2273: 2271: 2265: 2259: 2256: 2254: 2251: 2249: 2246: 2244: 2241: 2239: 2236: 2234: 2231: 2229: 2226: 2225: 2223: 2219: 2209: 2206: 2205: 2203: 2201: 2197: 2187: 2184: 2182: 2179: 2177: 2174: 2172: 2169: 2167: 2164: 2163: 2161: 2159: 2155: 2149: 2146: 2144: 2141: 2139: 2136: 2134: 2131: 2129: 2126: 2124: 2121: 2119: 2116: 2114: 2113:Coihaique Gp. 2111: 2109: 2106: 2105: 2103: 2101: 2097: 2091: 2088: 2086: 2083: 2081: 2078: 2076: 2073: 2071: 2068: 2066: 2063: 2061: 2058: 2056: 2053: 2051: 2048: 2046: 2043: 2041: 2038: 2036: 2035:Coihaique Gp. 2033: 2031: 2028: 2026: 2023: 2021: 2018: 2016: 2013: 2012: 2010: 2008: 2004: 2001: 1999: 1995: 1985: 1982: 1980: 1977: 1975: 1972: 1970: 1967: 1965: 1962: 1960: 1957: 1955: 1952: 1950: 1947: 1945: 1942: 1940: 1937: 1935: 1932: 1930: 1929:Cheuquemó Fm. 1927: 1925: 1922: 1920: 1917: 1915: 1912: 1911: 1909: 1907: 1903: 1897: 1894: 1892: 1889: 1887: 1884: 1882: 1879: 1877: 1874: 1872: 1869: 1867: 1864: 1862: 1861:Río Frías Fm. 1859: 1857: 1854: 1852: 1849: 1847: 1844: 1842: 1841:Puduhuapi Fm. 1839: 1837: 1834: 1832: 1829: 1827: 1824: 1822: 1819: 1817: 1814: 1812: 1809: 1807: 1804: 1802: 1799: 1797: 1794: 1792: 1789: 1787: 1784: 1782: 1779: 1777: 1774: 1772: 1769: 1767: 1764: 1762: 1759: 1757: 1756:Cheuquemó Fm. 1754: 1752: 1751:Chaicayán Gp. 1749: 1747: 1744: 1742: 1739: 1737: 1734: 1732: 1729: 1727: 1724: 1722: 1719: 1717: 1716:Angostura Fm. 1714: 1712: 1709: 1708: 1706: 1704: 1700: 1697: 1695: 1691: 1688: 1680: 1674: 1671: 1669: 1666: 1664: 1663:Madre de Dios 1661: 1659: 1656: 1654: 1651: 1649: 1646: 1644: 1641: 1639: 1636: 1634: 1631: 1630: 1628: 1624: 1620: 1613: 1608: 1606: 1601: 1599: 1594: 1593: 1590: 1579: 1575: 1571: 1561: 1555: 1552: 1551: 1549: 1545: 1533: 1530: 1529: 1528: 1525: 1521: 1520:Punta Peligro 1518: 1517: 1516: 1513: 1511: 1508: 1506: 1503: 1501: 1498: 1494: 1491: 1490: 1489: 1486: 1484: 1481: 1477: 1474: 1473: 1472: 1469: 1467: 1464: 1463: 1461: 1459: 1455: 1449: 1446: 1444: 1441: 1439: 1436: 1434: 1431: 1427: 1424: 1423: 1422: 1419: 1417: 1414: 1412: 1409: 1407: 1404: 1402: 1399: 1397: 1394: 1393: 1391: 1389: 1385: 1379: 1376: 1374: 1371: 1369: 1366: 1365: 1363: 1361: 1357: 1354: 1346: 1336: 1327: 1318: 1309: 1300: 1291: 1282: 1273: 1264: 1255: 1246: 1237: 1228: 1219: 1210: 1201: 1192: 1183: 1174: 1165: 1156: 1147: 1140: 1127: 1124: 1122: 1119: 1117: 1114: 1112: 1109: 1107: 1104: 1102: 1099: 1097: 1094: 1092: 1091:Tinguirirican 1089: 1087: 1084: 1082: 1081:Colhuehuapian 1079: 1077: 1074: 1072: 1069: 1067: 1064: 1062: 1059: 1057: 1054: 1052: 1049: 1047: 1044: 1042: 1041:Montehermosan 1039: 1037: 1036:Chapadmalalan 1034: 1032: 1029: 1027: 1024: 1022: 1019: 1018: 1016: 1012: 1008: 1001: 996: 994: 989: 987: 982: 981: 978: 964: 960: 959: 954: 949: 939: 935: 934: 929: 924: 914: 913: 907: 897: 896: 890: 881: 877: 873: 869: 868: 863: 861: 854: 853: 849: 842: 838: 833: 830: 826: 822: 817: 814: 808: 805: 799: 796: 793: 788: 785: 779: 776: 770: 768: 766: 762: 756: 750: 748: 744: 743: 738: 737: 732: 731: 726: 725: 720: 719: 714: 713: 708: 707: 702: 701: 696: 695: 690: 689: 684: 683: 678: 677: 672: 671: 666: 665: 660: 659: 654: 653: 648: 647: 643: 642: 636: 632: 630: 629: 625: 624: 621: 620: 616: 615: 609: 603: 602: 598: 597: 594: 593: 592:Theosodon sp. 589: 588: 582: 576: 575: 571: 570: 564: 560: 558: 557: 553: 552: 546: 542: 540: 539: 535: 534: 528: 524: 522: 521: 517: 516: 510: 506: 504: 503: 499: 498: 490: 486: 484: 483: 479: 475: 468: 465: 462: 461: 458: 452: 450: 448: 445: 441: 438: 434: 430: 426: 421: 417: 413: 405: 403: 401: 397: 393: 389: 385: 381: 377: 373: 369: 366: 362: 358: 354: 329: 320: 316: 312: 309:Santiago Roth 308: 304: 301: 298: 294: 289: 286: 283: 279: 276: 265: 261: 258: 255: 251: 246: 237:45.2°S 66.3°W 218: 216: 212: 207: 198:44.6°S 71.2°W 179: 177: 173: 168: 165: 161: 157: 153: 150: 146: 141: 138: 135: 131: 128: 125: 121: 108: 103: 98: 93: 88: 83: 78: 73: 68: 63: 58: 53: 47: 38: 33: 29: 25: 20: 2445: 2432: 2382:Gastre Fault 2362:Cachet Fault 2233:Elqui-Limarí 2148:Tobífera Fm. 2128:La Negra Fm. 2060:Ñirehuao Fm. 2050:Hornitos Fm. 1881:Traiguén Fm. 1860: 1776:Coquimbo Fm. 1761:Cholchol Fm. 1731:Caldera Beds 1554:Bibliography 1493:Lake Musters 1437: 1076:Santacrucian 967:, retrieved 962: 956: 942:, retrieved 937: 931: 917:, retrieved 911: 900:, retrieved 894: 883:, retrieved 871: 865: 859: 850:Bibliography 832: 816: 807: 798: 787: 778: 740: 734: 728: 722: 716: 710: 704: 698: 692: 686: 680: 674: 668: 662: 656: 650: 644: 626: 617: 599: 590: 572: 554: 536: 518: 500: 480: 456: 433:Santacrucian 409: 380:Cisnes River 376:Aysén Region 352: 351: 314:Year defined 291:Type section 257:Aysén Region 242:-45.2; -66.3 203:-44.6; -71.2 164:conglomerate 2316:Puerto Edén 2276:Bahía Mansa 2267:Metamorphic 2248:Panguipulli 2186:Tralcán Fm. 2171:Choiyoi Gp. 2123:La Liga Fm. 2055:La Liga Fm. 2045:Dorotea Fm. 1914:Abanico Fm. 1856:Ranquil Fm. 1826:Navidad Fm. 1821:Mininco Fm. 1816:Malleco Fm. 1721:Ayacara Fm. 1711:Abanico Fm. 1682:Sedimentary 1421:Honda Group 1106:Casamayoran 1096:Divisaderan 1066:Colloncuran 1046:Huayquerian 867:Ameghiniana 841:Fossilworks 825:Fossilworks 682:P. lemoinei 538:Nesodon sp. 440:environment 406:Description 374:located in 285:Aysén Basin 240: / 201: / 176:Coordinates 2468:Categories 2311:Mejillones 2221:Batholiths 2118:Ibáñez Fm. 2090:Zapata Fm. 2080:Viñita Fm. 2007:Cretaceous 1984:Vargas Fm. 1979:Temuco Fm. 1954:Lupica Fm. 1949:Loreto Fm. 1896:Vargas Fm. 1876:Temuco Fm. 1766:Chucal Fm. 1686:and groups 1684:formations 1668:Mejillonia 1360:Quaternary 1350:formations 1111:Itaboraian 969:2017-10-21 944:2017-10-21 919:2018-09-10 902:2018-09-10 885:2019-02-15 757:References 688:P. minutus 444:Cretaceous 388:Río Cisnes 2269:complexes 2200:Paleozoic 1964:Parga Fm. 1959:Oxaya Fm. 1919:Azapa Fm. 1906:Paleogene 1891:Tubul Fm. 1836:Parga Fm. 1831:Oxaya Fm. 1811:Lauca Fm. 1796:Lacui Fm. 1673:Patagonia 1638:Chaitenia 1458:Paleogene 1352:and sites 1126:Tiupampan 1116:Riochican 1101:Mustersan 1051:Chasicoan 1026:Ensenadan 860:Abderites 821:Río Frías 392:Marsupial 300:Río Frías 296:Named for 160:siltstone 143:Lithology 2489:Friasian 2286:Chañaral 2158:Triassic 2100:Jurassic 1998:Mesozoic 1944:Lebu Gp. 1694:Cenozoic 1658:Fitz Roy 1643:Chilenia 1626:Terranes 1570:Category 1348:Defining 1121:Peligran 1086:Deseadan 1071:Friasian 1061:Laventan 1021:Lujanian 466:Fossils 447:basement 429:Friasian 396:Friasian 370:made up 306:Named by 170:Location 133:Overlies 37:Friasian 2085:Way Gp. 1703:Neogene 1653:Cuyania 1547:Sources 1388:Neogene 965:: 57–87 940:: 19–55 477:Mammals 449:rocks. 437:fluvial 384:Spanish 363:) is a 357:Spanish 263:Country 228:66°18′W 225:45°12′S 189:71°12′W 186:44°36′S 156:tuffite 148:Primary 113:↓ 2345:Faults 2331:Trafún 2296:Chonos 2291:Choapa 1648:Chiloé 1574:Images 1056:Mayoan 1031:Uquian 472:Notes 469:Image 463:Group 281:Extent 272:  253:Region 2281:Belén 275:Chile 1014:Ages 843:.org 827:.org 317:1898 152:Tuff 123:Type 52:PreꞒ 876:doi 839:at 823:at 390:). 2470:: 1572:• 963:17 961:, 955:, 938:17 936:, 930:, 872:49 870:, 864:, 764:^ 745:, 739:, 733:, 727:, 721:, 715:, 709:, 703:, 697:, 691:, 685:, 679:, 673:, 667:, 661:, 655:, 649:, 386:: 359:: 158:, 154:, 102:Pg 46:Ma 30:: 1611:e 1604:t 1597:v 999:e 992:t 985:v 878:: 382:( 355:( 107:N 97:K 92:J 87:T 82:P 77:C 72:D 67:S 62:O 57:Ꞓ 41:~ 39:) 35:(

Index

Stratigraphic range
Middle Miocene
Friasian
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N
Geological formation
Ñirehuao Formation
Tuff
tuffite
siltstone
conglomerate
Coordinates
44°36′S 71°12′W / 44.6°S 71.2°W / -44.6; -71.2
Approximate paleocoordinates
45°12′S 66°18′W / 45.2°S 66.3°W / -45.2; -66.3
Aysén Region
Chile
Aysén Basin
Río Frías

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