Knowledge (XXG)

Viedma (volcano)

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and concave depressions are found especially on the southern part of the volcano, some of which are lined up in north–south direction. The northern sector of the volcano was apparently more heavily affected by glacial erosion; conversely, several craters in the southern sector appear to be young. The
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The Austral Volcanic Zone was identified as such in 1976, but some volcanoes were identified and localized later. Owing to their similar composition the three northerly volcanoes Lautaro, Viedma and Aguilera are grouped as the "northern Austral Volcanic Zone". Volcanism in the Austral Volcanic Zone
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Markgraf, Vera; Bradbury, J. Platt; Schwalb, Antje; Burns, Stephen J.; Stern, Charles; Ariztegui, Daniel; Gilli, Adrian; Anselmetti, Flavio S.; Stine, Scott; Maidana, Nora (27 July 2016). "Holocene palaeoclimates of southern Patagonia: limnological and environmental history of Lago Cardiel,
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explosive eruptions, while historical eruptions took place in 1908 at Reclus and 1910 at Monte Burney. Future eruptions of volcanoes in the Austral Volcanic Zone may lead to ash fall at large distances from the volcano, including interruptions in
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age. Outcrops of the basement are found around the volcano and could even occur on the edifice that crops out from the glaciers. The regional basement is formed by these Paleozoic and younger metamorphic and sedimentary rocks as well.
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Wastegård, S.; Veres, D.; Kliem, P.; Hahn, A.; Ohlendorf, C.; Zolitschka, B. (July 2013). "Towards a late Quaternary tephrochronological framework for the southernmost part of South America – the Laguna Potrok Aike tephra record".
501:, all of which are separated from the Austral Volcanic Zone and each other by gaps where no volcanic activity occurs. Unlike the Austral Volcanic Zone, volcanism in these other zones is controlled by the subduction of the 383:
which also led to the nunatak becoming known as the "Volcan Viedma"; but the lack of clear evidence and the difficulty of field sampling has rendered its identification with the Viedma vent contentious.
916:"Registro Histórico de Antecedentes Volcánicos y Sísmicos en la Patagonia Austral y la Tierra del Fuego. Historic Record of Volcanic and Seismic Precedents in Southern Patagonia and Tierra del Fuego" 331:
Few things are known with certainty about the volcanic edifice of Viedma as it is mostly buried beneath glacial ice and the "Viedma Nunatak" was later revealed to not be a volcano. In 1956
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There are no major population centres close to any volcano in the Austral Volcanic Zone, and the volcanoes are largely unmonitored. Among the know eruptions are large
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may have originated at Viedma, although Aguilera and Lautaro are also candidate source volcanoes. Due to the absence of traces of volcanism at Viedma Nunatak the
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is commonly interpreted to be the site of the volcano, after observations made in 1944-1945 and 1950 by survey flights including controversial sightings of
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2010 observed fewer craters and none of them larger than 1.5 kilometres (0.93 mi). These craters were later interpreted as being actually glacial
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Stern, Charles R. (1 February 2008). "Holocene tephrochronology record of large explosive eruptions in the southernmost Patagonian Andes".
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and only parts of it crop out. The outcropping nunatak is elongated in north–south direction. A number of structures interpreted as
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buried beneath glaciers; between eruptions they would be concealed below the ice; Lliboutry considered dark bands on the ice to be
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Perucca, Laura; Alvarado, Patricia; Saez, Mauro (1 July 2016). "Neotectonics and seismicity in southern Patagonia".
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at a rate of 3 centimetres per year (1.2 in/year). This subduction process is responsible for volcanism in the
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The nunatak is about 1,500 metres (4,900 ft) high above sea level. Most of the mountain is buried beneath the
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Kobayashi, Chiaki; Orihashi, Yuji; Hiarata, Daiji; Naranjo, Jose; Kobayashi, Makoto; Anma, Ryo (17 August 2010).
1438:"Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone" 746: 645: 312:. These volcanoes form a 700 kilometres (430 mi) long chain of volcanoes, the most southern of which is a 2103: 660:
exist, including reports of ashfalls, layers of tephra on glaciers and columns of smoke rising from the ice.
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Wastegård, Stefan (November 2012). "Tephrostratigraphy of the Potrok Aike Maar Lake Sediment Sequence".
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Different observations have yielded different sizes and numbers of supposed craters; González-Ferrán
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lies southwest of the volcano. The area is poorly accessible and the volcanic history poorly known.
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Blampied, Jorge; Barberon, Vanesa; Ghiglione, Matías; Leal, Pablo; Ramos, Víctor (August 2012).
489:. The Austral Volcanic Zone is one of four volcanic zones in the Andes, the other three are the 2186: 2143: 2118: 1980: 1657: 1622: 1607: 1506: 1459: 1422: 1344: 1271: 1235: 1191: 1125: 1071: 966: 927: 701: 401: 293: 2201: 2113: 2093: 2048: 1925: 1890: 1652: 1627: 1535: 1496: 1488: 1449: 1414: 1334: 1263: 1227: 1183: 1115: 1061: 1053: 534: 313: 301: 225: 692:
and direct ash damage. Viedma is considered to be Argentina's 10th most dangerous volcano.
621:, including three tephra layers 26,991 - 29,416, 40,656 - 48,219 and 41,555 - 57,669 years 2018: 1990: 1855: 1677: 1617: 962: 857: 606: 475: 396: 332: 2083: 1531: 1484: 1223: 1179: 1049: 367: 351:. Other reports of volcanic phenomena in the region exist, and the existence of a large 28: 1910: 1835: 641: 622: 530: 388: 348: 175: 2235: 2158: 2153: 2133: 1765: 1637: 1283: 1083: 471: 405: 1231: 1120: 1103: 2206: 2168: 1945: 1885: 1810: 637: 336: 305: 1187: 1323:"Towards the development of the first permanent volcano observatory in Argentina" 992: 990: 2163: 2013: 1880: 1875: 1865: 1805: 1612: 1405: 1381: 1376: 777: 775: 773: 771: 769: 767: 689: 586: 582: 545: 502: 443: 412: 282: 258: 1007: 1005: 945: 943: 941: 741: 233:
whose existence is questionable. It is supposedly located below the ice of the
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suite, but there is also an adakitic signature. The xenoliths may reflect a
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with sizes ranging 1.5–4 kilometres (0.93–2.49 mi), while Kobayashi
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Shipton, Eric (1960). "Volcanic Activity on the Patagonian Ice Cap".
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Viedma like other volcanoes of the Austral Volcanic Zone has erupted
439: 420: 416: 344: 340: 41: 1539: 1492: 1384:: 13th Chilean Geological Congress. pp. 380–382. Archived from 836: 834: 821: 819: 292:. This volcanic zone consists of six volcanoes, from north to south 1555: 1795: 1682: 672: 522: 459: 453: 366: 246: 182: 126: 971:(in Spanish). Ediciones de la Universidad de Chile. p. 413. 343:
deposits, a view supported by a 1958-1959 expedition that found
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on the Viedma Glacier. These materials later gave rise to a
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Note: volcanoes are ordered by latitude from north to south
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nunatak shows clear evidence of glacial action, including
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has been suggested as an explanation for volcanism there.
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Many observations referring to volcanic activity on the
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The Viedma Glacier and the Viedma Nunatak (centre-right)
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Nieves y glaciares de Chile: fundamentos de glaciologia
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and the interaction of these melts with the crust and
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Garcia, Sebastian; Badi, Gabriela (1 November 2021).
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The 1988 eruption deposited ash and pumice on the 2177: 1999: 1726: 1593: 1308: 840: 825: 205: 193: 188: 174: 89: 50: 40: 35: 21: 617:Tephra attributed to Viedma has been found in the 1407:The australandean volcanic zone (south Patagonia) 609:contamination of the magma erupted at Viedma. 1571: 335:proposed that volcanic activity may occur in 8: 1097: 1095: 1093: 909: 907: 2252:Volcanoes of Santa Cruz Province, Argentina 625:which may originate either on Viedma or on 1578: 1564: 1556: 18: 1500: 1453: 1338: 1119: 1065: 851: 849: 898: 883: 810: 728: 529:owing to the melting of the subducting 1296: 1157: 1023: 798: 648:removed its entry for Viedma in 2019. 458:Map of the volcanic zones arcs in the 736: 734: 732: 667:occurred in 1988, depositing ash and 224: 7: 525:from the Austral Volcanic Zone are 521:was being subducted in the region. 470:Off the southernmost west coast of 856:@SmithsonianGVP (15 August 2019). 505:beneath the South American Plate. 430:1995 reported several craters and 273:Viedma is located in the southern 14: 2242:Subglacial volcanoes of Argentina 1309:Perucca, Alvarado & Saez 2016 841:Perucca, Alvarado & Saez 2016 826:Perucca, Alvarado & Saez 2016 914:Mateo, Mateo (9 December 2008). 147: 140: 108: 101: 27: 1232:10.1016/j.quascirev.2012.10.019 1121:10.4067/S0716-02082004000200001 2247:Volcanoes of Magallanes Region 712:List of volcanoes in Argentina 640:and dated 3,345 - 3,010 years 632:Viedma has erupted during the 466:structures affecting volcanism 164:Show map of Southern Patagonia 148: 109: 1: 1404:Kilian, R. (15–17 May 1990). 1188:10.1016/j.quaint.2012.08.1843 658:Southern Patagonian Ice Field 509:is not well known before the 393:Southern Patagonian Ice Field 357:Southern Patagonian Ice Field 235:Southern Patagonian Ice Field 717:List of subglacial volcanoes 46:1,500 m (4,900 ft) 269:Geography and geomorphology 161:Viedma (Southern Patagonia) 2298: 1212:Quaternary Science Reviews 1108:Revista Geológica de Chile 1102:Stern, Charles R. (2004). 858:"Global Volcanism Program" 2220: 1268:10.1191/0959683603hl648rp 1058:10.1007/s00445-007-0148-z 94: 26: 2282:Quaternary South America 1520:The Geographical Journal 1172:Quaternary International 747:Global Volcanism Program 646:Global Volcanism Program 1455:10.5027/andgeoV37n2-a09 1340:10.30909/vol.04.S1.2148 1038:Bulletin of Volcanology 752:Smithsonian Institution 2267:Mountains of Argentina 2000:Southern Volcanic Zone 1786:Andagua volcanic field 1594:Northern Volcanic Zone 499:Southern Volcanic Zone 491:Northern Volcanic Zone 467: 372: 288:Viedma is part of the 222:Spanish pronunciation: 2272:Polygenetic volcanoes 2178:Austral Volcanic Zone 2104:Puyehue-Cordón Caulle 1776:Huambo volcanic field 1727:Central Volcanic Zone 1143:Kobayashi et al. 2010 997:Kobayashi et al. 2010 982:Kobayashi et al. 2010 782:Kobayashi et al. 2010 519:Chile Triple Junction 495:Central Volcanic Zone 487:Austral Volcanic Zone 457: 370: 290:Austral Volcanic Zone 283:lake of the same name 131:Show map of Argentina 2277:Quaternary volcanoes 2257:Andean Volcanic Belt 1713:Licto volcanic field 1391:on December 22, 2017 1174:. 279–280: 528–529. 1012:Blampied et al. 2012 950:Blampied et al. 2012 636:; a tephra found in 483:South American Plate 1532:1960GeogJ.126..389S 1485:2016GeolJ..51..545P 1224:2013QSRv...71...81W 1180:2012QuInt.279U.528W 1050:2008BVol...70..435S 665:subglacial eruption 601:. The rocks form a 70: /  2099:Carrán-Los Venados 2044:Nevados de Chillán 2029:Descabezado Grande 1473:Geological Journal 1026:, p. 301,302. 707:Aguilera (volcano) 619:Laguna Potrok Aike 593:, plagioclase and 468: 402:glacial striations 373: 231:subglacial volcano 200:Subglacial volcano 36:Highest point 16:Subglacial volcano 2229: 2228: 2039:Nevado de Longaví 1981:Cueros de Purulla 1961:Cordón del Azufre 1623:Nevado del Tolima 1428:978-2-7099-0993-8 702:Lautaro (volcano) 415:rocks, including 226:[ˈbjeðma] 215: 214: 74:49.367°S 73.317°W 2289: 2262:Active volcanoes 2224: 2094:Mocho-Choshuenco 1628:Nevado del Huila 1587:Andean volcanoes 1580: 1573: 1566: 1557: 1551: 1514: 1504: 1467: 1457: 1432: 1415:Grenoble, France 1412: 1400: 1398: 1396: 1390: 1373: 1353: 1352: 1342: 1318: 1312: 1306: 1300: 1294: 1288: 1287: 1250: 1244: 1243: 1206: 1200: 1199: 1167: 1161: 1155: 1146: 1140: 1134: 1133: 1123: 1099: 1088: 1087: 1069: 1033: 1027: 1021: 1015: 1009: 1000: 994: 985: 979: 973: 972: 959: 953: 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The 218:Viedma 155:Viedma 116:Viedma 22:Viedma 2089:Lanín 2019:Maipo 1966:Galán 1856:Lauca 1796:Misti 1683:Soche 1678:Aliso 1544:JSTOR 1411:(PDF) 1389:(PDF) 1372:(PDF) 1280:S2CID 1080:S2CID 862:Tweet 673:lahar 460:Andes 247:Chile 237:, an 183:Andes 127:Chile 2159:Macá 1507:ISSN 1460:ISSN 1423:ISBN 1397:2017 1345:ISSN 1272:ISSN 1236:ISSN 1192:ISSN 1126:ISSN 1072:ISSN 928:ISSN 585:and 565:and 540:The 531:slab 419:and 320:and 308:and 245:and 2154:Cay 1536:doi 1524:126 1497:hdl 1489:doi 1450:doi 1335:doi 1264:doi 1228:doi 1184:doi 1116:doi 1062:hdl 1054:doi 324:on 316:of 2238:: 1542:. 1534:. 1522:. 1505:. 1495:. 1487:. 1477:51 1475:. 1458:. 1446:37 1444:. 1440:. 1421:. 1417:: 1413:. 1380:. 1374:. 1343:. 1329:. 1325:. 1278:. 1270:. 1260:13 1258:. 1234:. 1226:. 1216:71 1214:. 1190:. 1182:. 1150:^ 1124:. 1112:31 1110:. 1106:. 1092:^ 1078:. 1070:. 1060:. 1052:. 1042:70 1040:. 1004:^ 989:^ 940:^ 924:36 918:. 906:^ 891:^ 874:^ 848:^ 833:^ 818:^ 789:^ 766:^ 750:. 744:. 731:^ 663:A 629:. 589:; 581:, 577:, 569:. 537:. 446:. 328:. 304:, 296:, 1579:e 1572:t 1565:v 1550:. 1538:: 1530:: 1513:. 1499:: 1491:: 1483:: 1466:. 1452:: 1431:. 1399:. 1351:. 1337:: 1331:4 1286:. 1266:: 1242:. 1230:: 1222:: 1198:. 1186:: 1178:: 1132:. 1118:: 1086:. 1064:: 1056:: 1048:: 934:. 868:. 860:( 760:. 220:( 125:/

Index


Elevation
Coordinates
49°22′S 73°19′W / 49.367°S 73.317°W / -49.367; -73.317
Viedma is located in Argentina
Argentina
Chile
Viedma is located in Southern Patagonia
Parent range
Andes
Mountain type
Subglacial volcano
Last eruption
[ˈbjeðma]
subglacial volcano
Southern Patagonian Ice Field
area disputed
Argentina
Chile
ice field
mudflow
Viedma Lake
Nunatak
Patagonian Andes
Mount FitzRoy
lake of the same name
Austral Volcanic Zone
Lautaro
Aguilera
Reclus

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