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San Pedro (Chile volcano)

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31: 152: 1124: 145: 558:. A 250 metres (820 ft) high scarp west of the eastern summit was left by the collapse of San Pedro; otherwise much of the evidence was buried by later volcanic activity. As with the mudflows, the steep slopes of San Pedro probably facilitated the onset of the sector collapse, which descended over an elevation difference of about 2,845 metres (9,334 ft). 991:
has yielded ages of between 110,000 and 56,000 years ago for La Poruña; it was previously proposed that this cone formed in the late 19th century. The La Poruña cone formed in two separate eruptions, each of which yielded a long lava flow; the second eruption remains undated. The southwest dome is of
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at an elevation of 5,000 metres (16,000 ft) lies on the southwestern flank of San Pedro and also seems to be a parasitic vent. Andesite lava flows emanate from this area as well. They are the largest found on San Pedro, with volumes of 3 cubic kilometres (0.72 cu mi) and a surface area
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on San Pedro, which removed the northwestern flank of the volcano and formed a large debris avalanche deposit. This avalanche deposit covers a surface area of 120 square kilometres (46 sq mi) and its front is 35–40 metres (115–131 ft) high in the Pampa de la Avestruz. The debris flow
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and volcanic debris. At least three individual ignimbrites have been found; one of the ignimbrites, the San Pedro Ignimbrite, may have originated from a vent now covered by San Pedro volcano although the neighbouring Caracanal volcano is also a candidate source. The crust in the region is about 70
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6 kilometres (3.7 mi) farther east. Between the two lies the so-called "Central Crater" at an elevation of 5,250 metres (17,220 ft). San Pedro itself is formed from the easterly "Old Cone" whose most prominent expression is the eastern summit, and the westerly "Young Cone" which is only
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nature, and no geological evidence of them has been found. The timing of eruptions at San Pedro sometimes is unclear; one eruption reported from 1877 may instead have occurred in 1891 as there are two reports of an eruption before 1910 and they may either refer to one eruption with two candidate
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González-Maurel, Osvaldo; Godoy, Benigno; le Roux, Petrus; Rodríguez, Inés; Marin, Carolina; Menzies, Andrew; Bertin, Daniel; Morata, Diego; Vargas, Marina (March 2019). "Magmatic differentiation at La Poruña scoria cone, Central Andes, northern Chile: Evidence for assimilation during turbulent
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are also found on the volcano; the largest of which covers large parts of the edifice and has a total volume of approximately 1.5 cubic kilometres (0.36 cu mi). These deposits contain prismatic jointed blocks and poorly sorted pumice, with their thickness ranging from a thick layer to
1031:. Other eruptions reported from San Pedro were in 1901 when an eruption caused damage, May–August 1910, 1911, February 1938 and a minor event in December 1960. Additional eruptions are mentioned in records and dated to 1870, 1916, 1917, 1923. All these eruptions are uncertain and apparently of 492:
of volumes between 0.1–1.7 cubic kilometres (0.024–0.408 cu mi) make up part of the edifice. The upper part of the Younger Cone is covered with such lava flows, which have steep fronts and are up to 100 metres (330 ft) thick. Downslope the lava flows are found mainly over the
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Pritchard, M. E.; Henderson, S. T.; Jay, J. A.; Soler, V.; Krzesni, D. A.; Button, N. E.; Welch, M. D.; Semple, A. G.; Glass, B. (2014-06-01). "Reconnaissance earthquake studies at nine volcanic areas of the central Andes with coincident satellite thermal and InSAR observations".
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output of San Pedro is about 161 ± 150 tonnes per day (1.86 ± 1.74 kg/s). Fumaroles were also reported from the Ojos de San Pedro area south of San Pedro volcano, and a report published in 1894 mentions a smell of sulfur at La Poruña. In addition,
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that covers much of the southern, southwestern and western slopes of San Pedro and reaches thicknesses of 3 metres (9.8 ft). It has a volume of 2–15 cubic kilometres (0.48–3.60 cu mi) and is called the El Encanto ignimbrite.
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Godoy, Benigno; Wörner, Gerhard; Kojima, Shoji; Aguilera, Felipe; Simon, Klaus; Hartmann, Gerald (July 2014). "Low-pressure evolution of arc magmas in thickened crust: The San Pedro–Linzor volcanic chain, Central Andes, Northern Chile".
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feeding the volcano probably formed from the mixing of magmas of distinct temperatures, as indicated by various clues indicating significant thermal disequilibrium between various components. Ultimately they originate in the
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kilometres (43 mi) thick. The older composite volcano centres include Cerro Carcanal and Cerro Huiche south-southeast of San Pedro and Cerro del Diablo due north. This surface slopes down to the Loa River in the west.
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which is just 9 kilometres (5.6 mi) away from the volcano. The second hazard is formed by a large explosive eruption resulting in ash fall and the emplacement of ignimbrites; the whole region could be affected if the
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Activity of the Young Cone began after the collapse within the scar left by the failure of the edifice. This activity involved the extrusion of four groups of lavas of both andesitic and dacitic composition as well as
445:; such sizes of the volcanoes occur because the edifices rise from a relatively high basement. Volcanism in this region is relatively poorly studied and there is not much present-day activity; with the exception of 581:
emanate from that area, reaching a considerable distance from the cone. These flows are subdivided into a small proximal unit and two distant ones, and feature structures such as ogives and levees. In addition, a
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formed by the sector collapse does not have many of the typical hummock-like hills of volcanic sector collapse deposits and instead features grooves and radial ridges. Such flank collapse occurred notably on
883:. The eruption of La Poruña appears to have been accompanied by a change in the magma system of the general volcano, a more recent hypothesis regards this cone as a separate volcanic system from San Pedro. 2872:
Francis, P. W.; Roobol, M. J.; Walker, G. P. L.; Cobbold, P. R.; Coward, M. (1974-01-01). "The San Pedro and San Pablo volcanoes of northern Chile and their hot avalanche deposits".
1117:. The easiest route is by the north slopes to the col then by the east slope to the summit. It was first climbed by George Courty (France) and Filemón Morales (Chile) July 16, 1903. 606:. The chronology of glaciations in the Central Andes is poorly known but stratigraphic relations indicate that San Pedro was glaciated during the late Pleistocene. There are active 794:; one of these is the 65 million years old Cerro Colorado pluton. However, in the area of San Pedro this basement is entirely buried beneath volcanites of Miocene age, including 500:; the largest is known as Estación flow and covers much of the southern and western foot of San Pedro to distances of 30 kilometres (19 mi); the debris apron reaches the 517:
scattered rocks. Their formation was probably due to the steep incline of San Pedro's slopes which tended to destabilize lava bodies high on the edifice, similar to regular
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formed in the summit region, and partly underwent collapse forming hot avalanche deposits; it is possible that the 1901 eruption was one of these lava dome forming events.
1078: 2413: 988: 508:. These mudflows occurred between 110,000 – 36,000 years ago and they filled the river bed of the Loa, while the impact on the San Pedro River was much more minor. 493:
northwestern flank where they radiate away from San Pedro's crater. The total volume of the volcano is estimated to be 56 cubic kilometres (13 cu mi).
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and volcanic deposits of the Young Cone; it forms about 80% of the volume of the present-day San Pedro edifice. One date has been obtained on Old Cone lavas by
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expanded. Temperatures strongly fluctuate between day and night; they can go as low as −25 °C (−13 °F) and as high as 25–30 °C (77–86 °F).
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Jay, J. A.; Welch, M.; Pritchard, M. E.; Mares, P. J.; Mnich, M. E.; Melkonian, A. K.; Aguilera, F.; Naranjo, J. A.; Sunagua, M.; Clavero, J. (January 2013).
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The history of volcanic activity at San Pedro indicates two principal hazards from future eruptions. The first is the formation of long debris avalanches or
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Barcaza, Gonzalo; Nussbaumer, Samuel U.; Tapia, Guillermo; Valdés, Javier; García, Juan-Luis; Videla, Yohan; Albornoz, Amapola; Arias, Víctor (July 2017).
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which extend as far as 10 kilometres (6.2 mi) west of San Pedro and 8 kilometres (5.0 mi) from the cone. The cone's western side slumped and
378: 397: 2840:"Long term low latitude and high elevation cosmogenic 3He production rate inferred from a 107ka-old lava flow in northern Chile; 22°S-3400ma.s.l." 295:, and is itself formed by two separate edifices usually known as the Old Cone and the Young Cone. These edifices are formed by rocks ranging from 1000:
magma at depth about 100,000 years ago may have stimulated the occurrence of eruptions not only at San Pedro but also at neighbouring volcanoes.
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Marín, Carolina; Rodríguez, Inés; Godoy, Benigno; González-Maurel, Osvaldo; Le Roux, Petrus; Medina, Eduardo; Bertín, Daniel (28 October 2020).
460:. Its height has been variously given as 6,145 metres (20,161 ft), 6,142 metres (20,151 ft) or 6,163 metres (20,220 ft). It is a 3205: 2756: 594:
San Pedro has been glaciated in the past. Evidence of such glaciation is found especially on the southern side of the Old Cone and it includes
1123: 2994:"Upper crustal differentiation processes and their role in 238U-230Th disequilibria at the San Pedro-Linzor volcanic chain (Central Andes)" 2673: 3120: 370: 2342:(in Spanish). Museum of Comparative Zoology Harvard University. Valparaíso : Litografia e Impr. Industrial (F. Peters). p. 244. 744: 2992:
Godoy, Benigno; McGee, Lucy; González-Maurel, Osvaldo; Rodríguez, Inés; le Roux, Petrus; Morata, Diego; Menzies, Andrew (October 2020).
369:; the border to Bolivia is 35 kilometres (22 mi) away. The whole region is remote and thinly populated; towns in the area include 3296: 2917:
Francis, P. W.; Wells, G. L. (1988-07-01). "Landsat Thematic Mapper observations of debris avalanche deposits in the Central Andes".
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on the San Pedro River, forming a lake which no longer exists. As reported in 1926, the slopes of San Pedro were used to cultivate
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is over 20 kilometres (12 mi) high. In light of the height of the edifice, partial collapses are also a possibility. A few
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reported "strong shaking of the earth", the emission of large quantities of white steam, and damage to the railway, houses and
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occurred at the beginning of the Holocene. Some eruptions reportedly occurred during historical time; presently the volcano is
3181: 1172: 3396: 2439:"Volcanic hotspots of the central and southern Andes as seen from space by ASTER and MODVOLC between the years 2000 and 2010" 3248:"Gas emissions from five volcanoes in northern Chile and implications for the volatiles budget of the Central Volcanic Zone" 951:: 160,000 years ago. After activity of the Old Cone ceased, glacial and fluvial erosion dissected San Pedro until the large 3406: 1257: 259:
and at 6,155 metres (20,194 ft) in elevation one of the highest active volcanoes in the world. Part of the Chilean
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Pritchard, M. E.; Simons, M. (February 2004). "An InSAR-based survey of volcanic deformation in the central Andes".
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San Pedro is one of the highest volcanoes in the world and is visible as far as 85 kilometres (53 mi) away in
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about 15,000 years ago. The Plinian eruption was even more recent, occurring about 10,000 years ago (10,085 ± 45
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occurred. The so-called "white airfall" with a volume of 2.5 cubic kilometres (0.60 cu mi) as well as
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San Pedro formed in two stages, which are known as the Old Cone and the Young Cone. The Old Cone was formed by
2799:"General characteristics of active andean volcanoes and a summary of their activities during recent centuries" 477:
emerge from a breach in this crater and have filled an older 1.2 kilometres (0.75 mi) wide older crater.
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Delunel, Romain; Blard, Pierre-Henri; Martin, Léo C. P.; Nomade, Sébastien; Schlunegger, Fritz (2016-07-01).
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at elevations of over 4,400 metres (14,400 ft) as well as other glacially modified surfaces such as
207: 1140: 414:, one of the two belts of volcanoes in Chile, which contains a total of about 44 active volcanoes plus 3314:
Zeil, Werner (1964-12-01). "Die Verbreitung des jungen Vulkanismus in der Hochkordillere Nordchiles".
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deposits and its heat output is visible from space. Based on measurements made in December 2013, the
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are the only ongoing activity at San Pedro; a steam plume is barely visible. The fumarole has formed
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dates or two eruptions. This volcanic activity makes San Pedro one of the highest active volcanoes.
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fall deposit is known from San Pedro; the size of the deposit indicates that it was as large as the
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The Old Cone was active over one hundred thousand years ago and was eventually truncated by a giant
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that runs in that area. It is a 900 metres (3,000 ft) wide and 140 metres (460 ft) high
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named La Poruña lies on the western foot of San Pedro, its formation was probably influenced by a
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activity has been observed at the volcano, while deformation of the edifice has not been noted.
3138:"Volcanological and petrological evolution of San Pedro volcano, Provincia EI Loa, North Chile" 3076: 673: 669: 195: 60: 685: 665: 411: 264: 3198:"Climatic implications of rock glaciers in the arid Western Cordillera of the Central Andes" 496:
Scars at elevations of 5,500 metres (18,000 ft) on the edifice have been the origin of
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ascent processes, and genetic links with mafic eruptions at adjacent San Pedro volcano".
2672:(Report). Carta geológica de Chile: Serie Geología Ambiental (in Spanish). Vol. 17. 2400: 1335: 708: 704: 681: 650: 465: 426: 292: 36: 3327: 3266: 3153: 3092: 3051: 3009: 2976: 2930: 2885: 2854: 2814: 2727: 2623: 2588: 2533: 2454: 2337: 1992: 1923: 723:, with northwest–southeast and north–south lineaments common. One such lineament is the 3347: 3173: 3112: 3063: 3029: 2950: 2905: 2750: 2635: 2545: 2474: 2347: 2004: 1113:
San Pedro is climbed relatively frequently due to its proximity to the tourist town of
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on the western summit may have been erupted during the collapse but this is uncertain.
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65 kilometres (40 mi) long San Pedro-Linzor lineament, which includes San Pedro,
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Tamburello, G.; Hansteen, T. H.; Bredemeyer, S.; Aiuppa, A.; Tassi, F. (2014-07-28).
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constructed the Young Cone as well as the lateral centre La Poruña. This volcano was
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comparable age to La Poruña, 107,000 ± 12 years ago. In general, dates obtained by
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age and approach heights of about 7,000 metres (23,000 ft) above sea level at
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which spans Chile and Argentina. In addition, Colombia and Ecuador feature the
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Eruptions at San Pedro are reported from possibly 1885, when a newspaper from
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Volcanoes in this region of Chile often form lineaments perpendicular to the
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passes around the northern, northwestern and western flanks of the volcano.
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There were two cycles of volcanic activity in Chile, the first during the
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on the southern flank , but there are no glaciers presently on San Pedro.
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on one of these units has yielded an age of 100,000 ± 35,000 years ago.
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of 19 square kilometres (7.3 sq mi); they reach a distance of
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deposits are found on San Pedro's summit and were mined into the 1930s.
3335: 3284: 2938: 2893: 2549: 2191: 2143: 2083: 1358: 1356: 1354: 1352: 1098: 1028: 1024: 847: 835:. Volcanic rocks erupted during both stages of San Pedro belong to the 828: 795: 732: 538: 422: 323: 280: 2281: 2230: 2008: 1875: 653:. This subduction process is responsible for volcanic activity in the 355: 271:. This region of volcanism includes the world's two highest volcanoes 2167: 1628: 1586: 1569: 1440: 1012: 964: 908: 859: 836: 787: 622: 583: 578: 574: 518: 501: 489: 474: 450: 319: 3040: 2541: 2517: 2462: 2299: 2209: 1857: 1349: 2000: 1040: 912: 896: 855: 824: 812: 791: 700: 696: 630: 530: 430: 343: 300: 249: 3245: 3074: 2991: 2491: 2311: 2275: 2251: 2224: 2185: 2077: 1869: 1548: 1434: 2372: 2370: 1129:
San Pablo volcano as seen from just below the summit of San Pedro
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flow. Apparently, the emission of each lava unit was preceded by
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lead up to San Pedro's summit, and roads run around the volcano;
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Geología del área Ascotán-Cerro Inacaliri, Región de Antofagasta
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Amigo, Álvaro R.; Bertin, Daniel U.; Orozco, Gabriel L. (2012).
1048: 1004: 968: 936: 880: 832: 783: 728: 611: 537:. This Plinian eruption was accompanied by the formation of an 482: 469:
about 100 metres (330 ft) lower. The "Young Cone" has two
390: 304: 50: 2367: 1817: 1815: 711:, neither of which show evidence of recent volcanic activity. 322:
that removed its northwestern side. Within the landslide scar
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Hanson, Earl (1926). "Out-of-the-World Villages of Atacama".
997: 867: 534: 393: 260: 256: 183: 164: 2418: 2131: 2037: 2035: 2033: 1960: 1905: 1887: 1788: 1559: 1557: 1483:"Active Andean volcanism: its geologic and tectonic setting" 1389: 279:. San Pedro, like other Andean volcanoes, was formed by the 2107: 1827: 1812: 1800: 1730: 1728: 1726: 1724: 1413: 1401: 932: 892: 846:
San Pedro volcanic rocks are usually glassy with only tiny
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San Pedro is part of the 600 kilometres (370 mi) long
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A large eruption covered parts of the upper edifice with
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complex; the youngest edifice is the westernmost one.
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which also spans Peru, Bolivia and Argentina, and the
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flows at the foot of San Pedro volcano, and joins the
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on the mountain, with traces of past rock glaciers in
2776:"Geología y peligros del volcán San Pedro, II Región" 2020: 2018: 1899: 1307: 1305: 996:
range from 168,000 to 68,000 years ago. The entry of
2603: 2497: 2059: 2047: 1839: 1687:Aravena, Diego; Villalón, Ignacio; Pablo, Sánchez. 1680: 1530: 1515: 1235:(in Spanish). Talleres Gráficos Plate. p. 45. 684:at the southernmost tip of South America forms the 2317: 2257: 2015: 1948: 1302: 1105:publishes a volcano hazard level for the volcano. 3136:O'Callaghan, L. J.; Francis, P. W. (1986-03-01). 2703: 2664: 2387: 2385: 743:and Linzor. Other volcanoes with such trends are 449:, most present-day manifestations are limited to 3373: 2803:Bulletin of the Seismological Society of America 2443:Geological Society, London, Special Publications 1686: 16:One of the tallest active volcanoes in the world 2658: 2609: 1157: 354:San Pedro is located in northern Chile, in the 3223: 2774:Bertin, Daniel; Amigo, Álvaro (October 2015). 2577:Journal of Volcanology and Geothermal Research 2424: 2382: 2137: 2113: 1966: 1893: 1794: 1419: 1407: 1395: 1252: 1250: 389:lies southwest of the volcano. Tracks left by 349: 2667:Peligros volcánicos de la Zona Norte de Chile 1322: 1320: 1230: 2916: 2430: 1833: 1821: 1806: 1476: 1474: 1472: 1226: 1224: 267:of the Andes, one of the four tracts of the 2773: 2743:The Andes - A Guide for Climbers and Skiers 2709: 2652: 1734: 1296: 1247: 903:and much of it rains out as it crosses the 875:, but undergo storage in shallower crustal 637:, a plant that was grown as a fuel source. 591:13 kilometres (8.1 mi) from the vent. 473:, the eastern of which is the younger one. 3224:Selles, Daniel; Gardeweg, M (2018-06-27). 2755:: CS1 maint: location missing publisher ( 2734: 2509: 2329: 1972: 1317: 3274: 2862: 2796: 2399:(in Spanish). Sernageomin. Archived from 2376: 2041: 1931: 1563: 1498: 1469: 1334:(in Spanish). Sernageomin. Archived from 1264:(in Spanish). Sernageomin. Archived from 1221: 2998:Journal of South American Earth Sciences 2965:Journal of South American Earth Sciences 1011:years ago). After this event four small 3367:"Volcán San Pedro, Chile" on Peakbagger 2674:Servicio Nacional de Geología y Minería 895:climate with infrequent precipitation. 660:The volcanoes of Chile are part of the 3374: 2745:(5th ed.). Scotland. p. 201. 2740: 2515: 2335: 1978: 1018: 899:ultimately originates on the tropical 657:, as well as elsewhere in the Andes. 263:' volcanic segment, it is part of the 3195: 2323: 2263: 2024: 1954: 1480: 1199: 1197: 1195: 1193: 1191: 1189: 688:south of the Southern Volcanic Zone. 3313: 2612:Geochemistry, Geophysics, Geosystems 2503: 2065: 2053: 1845: 1536: 1524: 1311: 629:lava flows from San Pedro created a 3123:from the original on 26 August 2021 2339:Revista chilena de historia natural 1481:Stern, Charles R. (December 2004). 1101:activity at San Pedro. The Chilean 926: 774:of the region is formed by various 239:George Courty & Filemón Morales 13: 1186: 464:, which forms a twin volcano with 14: 3423: 3360: 3202:Glacial Geology and Geomorphology 3142:Journal of the Geological Society 2797:Casertano, Lorenzo (1963-12-01). 429:. Many of these volcanoes are of 291:. It has a neighbouring volcano, 151: 2597:10.1016/j.jvolgeores.2014.05.004 1122: 919:by a wetter period during which 866:being secondary components. The 858:are the dominant minerals, with 823:. Young Cone lavas include both 150: 143: 29: 3392:Volcanoes of Antofagasta Region 3302:from the original on 2018-07-20 3208:from the original on 2018-02-26 3184:from the original on 2017-08-15 2843:Geochimica et Cosmochimica Acta 2556:from the original on 2024-02-04 1500:10.4067/S0716-02082004000200001 1175:from the original on 2021-08-17 1146:List of Ultras of South America 699:and a second starting from the 2516:Pasley, Charles M. S. (1894). 2174:O'Callaghan & Francis 1986 2162:O'Callaghan & Francis 1986 1696:World Geothermal Congress 2015 1646:O'Callaghan & Francis 1986 1608:O'Callaghan & Francis 1986 1581:O'Callaghan & Francis 1986 1464:O'Callaghan & Francis 1986 1363:O'Callaghan & Francis 1986 1231:Echevarria C., Evelio (1999). 806: 786:ranging in their age from the 676:, while the subduction of the 1: 1151: 724: 588: 545:There is evidence of a large 55:6,155 m (20,194 ft) 3397:Six-thousanders of the Andes 3255:Geophysical Research Letters 3060:10.1016/j.lithos.2019.03.033 3018:10.1016/j.jsames.2020.102672 2985:10.1016/j.jsames.2014.02.004 1233:Chile Andinista: Su Historia 939:and later largely buried by 645:Beneath northern Chile, the 65:2,034 m (6,673 ft) 7: 3407:Pleistocene stratovolcanoes 3239:10.13140/rg.2.2.30946.84165 3233:(in Spanish). Unpublished. 2300:González-Maurel et al. 2019 2210:González-Maurel et al. 2019 1858:González-Maurel et al. 2019 1134: 1108: 714: 350:Geography and geomorphology 10: 3428: 3101:10.1007/s00445-020-01410-7 2766: 2716:AGU Fall Meeting Abstracts 2425:Selles & Gardeweg 2018 2138:Selles & Gardeweg 2018 2114:Selles & Gardeweg 2018 1967:Selles & Gardeweg 2018 1894:Selles & Gardeweg 2018 1795:Selles & Gardeweg 2018 1487:Revista Geológica de Chile 1420:Selles & Gardeweg 2018 1408:Selles & Gardeweg 2018 1396:Selles & Gardeweg 2018 1141:List of volcanoes in Chile 886: 811:Old Cone lavas range from 640: 625:southwest of the volcano; 2864:10.1016/j.gca.2016.04.023 1079:International Route CH-21 873:Altiplano-Puna Magma Body 221: 216: 206: 194: 189: 175: 137: 132: 93: 81: 69: 59: 49: 44: 39:volcano immediately right 28: 23: 3412:Holocene stratovolcanoes 3382:Stratovolcanoes of Chile 3162:10.1144/gsjgs.143.2.0275 2522:The Geographical Journal 1834:Francis & Wells 1988 1822:Francis & Wells 1988 1807:Francis & Wells 1988 1210:Global Volcanism Program 3081:Bulletin of Volcanology 2919:Bulletin of Volcanology 2653:Bertin & Amigo 2015 2393:"San Pedro y San Pablo" 1735:Bertin & Amigo 2015 1328:"San Pedro y San Pablo" 1297:Bertin & Amigo 2015 1258:"San Pedro y San Pablo" 1215:Smithsonian Institution 989:surface-exposure dating 229:; 121 years ago 3196:Payne, Donald (1998). 2823:10.1785/BSSA0530061415 2492:Tamburello et al. 2014 1549:Tamburello et al. 2014 1435:Tamburello et al. 2014 674:Northern Volcanic Zone 670:Southern Volcanic Zone 307:and are emplaced on a 3316:Geologische Rundschau 2874:Geologische Rundschau 2741:Biggar, John (2020). 2379:, pp. 1421–1422. 1205:"San Pedro-San Pablo" 1077:that could reach the 686:Austral Volcanic Zone 666:Central Volcanic Zone 649:subducts beneath the 573:on top of a field of 427:monogenetic volcanoes 412:Central Volcanic Zone 265:Central Volcanic Zone 117:21.88778°S 68.39139°W 3276:10.1002/2014GL060653 3046:. 338–339: 128–140. 2632:10.1029/2003GC000610 2403:on February 26, 2018 1912:Annals of Glaciology 1338:on February 26, 2018 1268:on December 15, 2017 1115:San Pedro de Atacama 662:Pacific Ring of Fire 556:its eruption in 1980 385:; and the San Pedro 269:Andean Volcanic Belt 122:-21.88778; -68.39139 3328:1964GeoRu..53..731Z 3267:2014GeoRL..41.4961T 3154:1986JGSoc.143..275O 3093:2020BVol...82...74M 3052:2019Litho.338..128G 3010:2020JSAES.10202672G 2977:2014JSAES..52...24G 2931:1988BVol...50..258F 2886:1974GeoRu..63..357F 2855:2016GeCoA.184...71D 2815:1963BuSSA..53.1415C 2728:2010AGUFM.V21D2353M 2624:2004GGG.....5.2002P 2589:2014JVGR..280...90P 2534:1894GeogJ...3..105P 2455:2013GSLSP.380..161J 2336:Martin, O. (1897). 2288:Delunel et al. 2016 2237:Delunel et al. 2016 2164:, pp. 281–283. 2126:Francis et al. 1974 2102:Francis et al. 1974 1993:1926GeoRv..16..365H 1981:Geographical Review 1933:10.1017/aog.2017.28 1924:2017AnGla..58..166B 1882:Delunel et al. 2016 1785:, pp. 373–374. 1783:Francis et al. 1974 1771:Francis et al. 1974 1759:Francis et al. 1974 1747:Francis et al. 1974 1716:Francis et al. 1974 1675:Francis et al. 1974 1663:Francis et al. 1974 1623:Francis et al. 1974 1384:Francis et al. 1974 1019:Historical activity 973:explosive eruptions 879:and absorb crustal 800:composite volcanoes 705:Pampa del Tamarugal 682:South America Plate 651:South America Plate 289:South America Plate 113: /  3402:Mountains of Chile 3336:10.1007/BF02054561 2939:10.1007/BF01047488 2894:10.1007/BF01820994 2397:www.sernageomin.cl 2355:Unknown parameter 1332:www.sernageomin.cl 1262:www.sernageomin.cl 994:argon-argon dating 981:Argon-argon dating 949:argon-argon dating 905:Eastern Cordillera 891:The region has an 782:rocks intruded by 709:Coastal Cordillera 655:Western Cordillera 481:altered rocks and 367:Antofagasta Region 45:Highest point 3261:(14): 4961–4969. 2312:Godoy et al. 2020 2276:Marín et al. 2020 2252:Marín et al. 2020 2225:Marín et al. 2020 2198:Godoy et al. 2014 2186:Godoy et al. 2020 2150:Godoy et al. 2014 2090:Godoy et al. 2014 2078:Godoy et al. 2020 1870:Marín et al. 2020 1169:Andes Specialists 1075:pyroclastic flows 977:pyroclastic flows 957:pyroclastic flows 821:basaltic andesite 604:striated boulders 514:pyroclastic flows 462:composite volcano 328:pyroclastic flows 297:basaltic andesite 253:composite volcano 243: 242: 227:16 July 1903 3419: 3387:Active volcanoes 3355: 3310: 3308: 3307: 3301: 3278: 3252: 3242: 3232: 3220: 3214: 3213: 3192: 3190: 3189: 3132: 3130: 3128: 3071: 3037: 2988: 2958: 2913: 2868: 2866: 2834: 2809:(6): 1415–1433. 2793: 2791: 2790: 2761: 2760: 2754: 2746: 2738: 2732: 2731: 2707: 2701: 2700: 2698: 2696: 2691:on June 29, 2021 2690: 2684:. Archived from 2671: 2662: 2656: 2650: 2644: 2643: 2607: 2601: 2600: 2571: 2565: 2564: 2562: 2561: 2513: 2507: 2501: 2495: 2489: 2483: 2482: 2434: 2428: 2422: 2416: 2411: 2409: 2408: 2389: 2380: 2374: 2365: 2364: 2358: 2353: 2351: 2343: 2333: 2327: 2321: 2315: 2309: 2303: 2297: 2291: 2285: 2279: 2273: 2267: 2261: 2255: 2249: 2240: 2234: 2228: 2222: 2213: 2207: 2201: 2195: 2189: 2183: 2177: 2171: 2165: 2159: 2153: 2147: 2141: 2135: 2129: 2123: 2117: 2111: 2105: 2099: 2093: 2087: 2081: 2075: 2069: 2063: 2057: 2051: 2045: 2039: 2028: 2022: 2013: 2012: 1976: 1970: 1964: 1958: 1952: 1946: 1945: 1935: 1903: 1897: 1891: 1885: 1879: 1873: 1867: 1861: 1855: 1849: 1843: 1837: 1831: 1825: 1819: 1810: 1804: 1798: 1792: 1786: 1780: 1774: 1768: 1762: 1756: 1750: 1744: 1738: 1732: 1719: 1713: 1707: 1706: 1704: 1702: 1693: 1684: 1678: 1672: 1666: 1660: 1649: 1643: 1626: 1620: 1611: 1605: 1584: 1578: 1567: 1561: 1552: 1546: 1540: 1534: 1528: 1522: 1513: 1512: 1502: 1478: 1467: 1461: 1438: 1432: 1423: 1417: 1411: 1405: 1399: 1393: 1387: 1381: 1366: 1360: 1347: 1346: 1344: 1343: 1324: 1315: 1309: 1300: 1294: 1277: 1276: 1274: 1273: 1254: 1245: 1244: 1228: 1219: 1218: 1201: 1184: 1183: 1181: 1180: 1161: 1126: 1095:seismic stations 1087: 1064: 1062: 1061: 927:Eruptive history 726: 590: 552:Mount St. Helens 406: 340:Plinian eruption 315:volcanic rocks. 237: 235: 230: 179: 154: 153: 147: 128: 127: 125: 124: 123: 118: 114: 111: 110: 109: 106: 33: 21: 20: 3427: 3426: 3422: 3421: 3420: 3418: 3417: 3416: 3372: 3371: 3363: 3358: 3305: 3303: 3299: 3250: 3230: 3211: 3209: 3187: 3185: 3126: 3124: 2788: 2786: 2769: 2764: 2748: 2747: 2739: 2735: 2708: 2704: 2694: 2692: 2688: 2669: 2663: 2659: 2651: 2647: 2608: 2604: 2572: 2568: 2559: 2557: 2542:10.2307/1774025 2514: 2510: 2502: 2498: 2494:, p. 4964. 2490: 2486: 2463:10.1144/SP380.1 2435: 2431: 2423: 2419: 2406: 2404: 2391: 2390: 2383: 2375: 2368: 2356: 2354: 2345: 2344: 2334: 2330: 2322: 2318: 2310: 2306: 2298: 2294: 2286: 2282: 2274: 2270: 2262: 2258: 2250: 2243: 2235: 2231: 2223: 2216: 2208: 2204: 2196: 2192: 2184: 2180: 2172: 2168: 2160: 2156: 2148: 2144: 2136: 2132: 2124: 2120: 2112: 2108: 2100: 2096: 2088: 2084: 2076: 2072: 2064: 2060: 2052: 2048: 2044:, p. 1415. 2040: 2031: 2023: 2016: 1977: 1973: 1965: 1961: 1953: 1949: 1904: 1900: 1892: 1888: 1880: 1876: 1868: 1864: 1856: 1852: 1844: 1840: 1832: 1828: 1820: 1813: 1805: 1801: 1793: 1789: 1781: 1777: 1769: 1765: 1757: 1753: 1745: 1741: 1733: 1722: 1714: 1710: 1700: 1698: 1691: 1685: 1681: 1673: 1669: 1661: 1652: 1644: 1629: 1621: 1614: 1606: 1587: 1579: 1570: 1566:, p. 1419. 1562: 1555: 1551:, p. 4962. 1547: 1543: 1535: 1531: 1523: 1516: 1479: 1470: 1462: 1441: 1437:, p. 4961. 1433: 1426: 1418: 1414: 1406: 1402: 1394: 1390: 1382: 1369: 1361: 1350: 1341: 1339: 1326: 1325: 1318: 1310: 1303: 1295: 1280: 1271: 1269: 1256: 1255: 1248: 1229: 1222: 1203: 1202: 1187: 1178: 1176: 1163: 1162: 1158: 1154: 1137: 1130: 1127: 1111: 1091:eruption column 1081: 1060: 1057: 1056: 1055: 1052: 1043:in the eastern 1021: 953:sector collapse 929: 889: 809: 717: 678:Antarctic Plate 643: 619:San Pedro River 547:sector collapse 521:. At least one 506:San Pedro River 443:Ojos del Salado 400: 387:railway station 363:El Loa Province 352: 273:Ojos del Salado 238: 233: 231: 228: 177: 171: 170: 169: 168: 167: 162: 161: 160: 159: 155: 121: 119: 115: 112: 107: 104: 102: 100: 99: 76:Ojos del Salado 40: 35:San Pedro with 17: 12: 11: 5: 3425: 3415: 3414: 3409: 3404: 3399: 3394: 3389: 3384: 3370: 3369: 3362: 3361:External links 3359: 3357: 3356: 3322:(2): 731–757. 3311: 3243: 3221: 3193: 3148:(2): 275–286. 3133: 3072: 3038: 2989: 2959: 2925:(4): 258–278. 2914: 2880:(1): 357–388. 2869: 2835: 2794: 2782:(in Spanish). 2770: 2768: 2765: 2763: 2762: 2733: 2702: 2676:. p. 15. 2657: 2645: 2602: 2566: 2508: 2506:, p. 752. 2496: 2484: 2429: 2417: 2381: 2377:Casertano 1963 2366: 2328: 2316: 2304: 2292: 2280: 2268: 2256: 2241: 2229: 2214: 2202: 2190: 2178: 2176:, p. 284. 2166: 2154: 2142: 2130: 2128:, p. 373. 2118: 2106: 2104:, p. 382. 2094: 2082: 2070: 2068:, p. 731. 2058: 2056:, p. 733. 2046: 2042:Casertano 1963 2029: 2014: 2001:10.2307/208707 1987:(3): 366,368. 1971: 1959: 1947: 1918:(75pt2): 177. 1898: 1886: 1874: 1862: 1850: 1848:, p. 756. 1838: 1836:, p. 260. 1826: 1824:, p. 276. 1811: 1809:, p. 279. 1799: 1787: 1775: 1773:, p. 383. 1763: 1761:, p. 368. 1751: 1749:, p. 370. 1739: 1720: 1718:, p. 364. 1708: 1679: 1677:, p. 362. 1667: 1665:, p. 365. 1650: 1648:, p. 279. 1627: 1625:, p. 363. 1612: 1610:, p. 278. 1585: 1583:, p. 277. 1568: 1564:Casertano 1963 1553: 1541: 1539:, p. 732. 1529: 1527:, p. 736. 1514: 1493:(2): 161–206. 1468: 1466:, p. 275. 1439: 1424: 1412: 1400: 1388: 1386:, p. 360. 1367: 1365:, p. 276. 1348: 1316: 1314:, p. 751. 1301: 1278: 1246: 1220: 1185: 1155: 1153: 1150: 1149: 1148: 1143: 1136: 1133: 1132: 1131: 1128: 1121: 1110: 1107: 1058: 1020: 1017: 928: 925: 917:before present 901:Atlantic Ocean 888: 885: 877:magma chambers 808: 805: 798:, remnants of 753:Cerro Cebollar 737:Cerro del León 716: 713: 642: 639: 600:rock pavements 563:parasitic vent 527:AD 79 eruption 479:Hydrothermally 398:Chile Route 21 351: 348: 241: 240: 225: 219: 218: 214: 213: 210: 204: 203: 198: 192: 191: 187: 186: 181: 173: 172: 163: 157: 156: 149: 148: 142: 141: 140: 139: 138: 135: 134: 130: 129: 97: 91: 90: 85: 79: 78: 73: 67: 66: 63: 57: 56: 53: 47: 46: 42: 41: 34: 26: 25: 15: 9: 6: 4: 3: 2: 3424: 3413: 3410: 3408: 3405: 3403: 3400: 3398: 3395: 3393: 3390: 3388: 3385: 3383: 3380: 3379: 3377: 3368: 3365: 3364: 3353: 3349: 3345: 3341: 3337: 3333: 3329: 3325: 3321: 3318:(in German). 3317: 3312: 3298: 3294: 3290: 3286: 3282: 3277: 3272: 3268: 3264: 3260: 3256: 3249: 3244: 3240: 3236: 3229: 3228: 3222: 3218: 3207: 3203: 3199: 3194: 3183: 3179: 3175: 3171: 3167: 3163: 3159: 3155: 3151: 3147: 3143: 3139: 3134: 3122: 3118: 3114: 3110: 3106: 3102: 3098: 3094: 3090: 3086: 3082: 3078: 3073: 3069: 3065: 3061: 3057: 3053: 3049: 3045: 3039: 3035: 3031: 3027: 3023: 3019: 3015: 3011: 3007: 3003: 2999: 2995: 2990: 2986: 2982: 2978: 2974: 2970: 2966: 2960: 2956: 2952: 2948: 2944: 2940: 2936: 2932: 2928: 2924: 2920: 2915: 2911: 2907: 2903: 2899: 2895: 2891: 2887: 2883: 2879: 2875: 2870: 2865: 2860: 2856: 2852: 2848: 2844: 2841: 2836: 2832: 2828: 2824: 2820: 2816: 2812: 2808: 2804: 2800: 2795: 2785: 2781: 2777: 2772: 2771: 2758: 2752: 2744: 2737: 2729: 2725: 2722:: V21D–2353. 2721: 2717: 2713: 2706: 2687: 2683: 2679: 2675: 2668: 2661: 2654: 2649: 2641: 2637: 2633: 2629: 2625: 2621: 2617: 2613: 2606: 2598: 2594: 2590: 2586: 2583:: V21D–2353. 2582: 2578: 2570: 2555: 2551: 2547: 2543: 2539: 2535: 2531: 2527: 2523: 2519: 2512: 2505: 2500: 2493: 2488: 2480: 2476: 2472: 2468: 2464: 2460: 2456: 2452: 2448: 2444: 2440: 2433: 2427:, p. 52. 2426: 2421: 2415: 2402: 2398: 2394: 2388: 2386: 2378: 2373: 2371: 2362: 2357:|agency= 2349: 2341: 2340: 2332: 2325: 2320: 2313: 2308: 2301: 2296: 2290:, p. 78. 2289: 2284: 2278:, p. 16. 2277: 2272: 2265: 2260: 2254:, p. 13. 2253: 2248: 2246: 2239:, p. 72. 2238: 2233: 2226: 2221: 2219: 2212:, p. 16. 2211: 2206: 2200:, p. 38. 2199: 2194: 2187: 2182: 2175: 2170: 2163: 2158: 2152:, p. 25. 2151: 2146: 2140:, p. 18. 2139: 2134: 2127: 2122: 2115: 2110: 2103: 2098: 2092:, p. 26. 2091: 2086: 2079: 2074: 2067: 2062: 2055: 2050: 2043: 2038: 2036: 2034: 2026: 2021: 2019: 2010: 2006: 2002: 1998: 1994: 1990: 1986: 1982: 1975: 1969:, p. 43. 1968: 1963: 1956: 1951: 1943: 1939: 1934: 1929: 1925: 1921: 1917: 1913: 1909: 1902: 1896:, p. 46. 1895: 1890: 1884:, p. 73. 1883: 1878: 1871: 1866: 1859: 1854: 1847: 1842: 1835: 1830: 1823: 1818: 1816: 1808: 1803: 1797:, p. 50. 1796: 1791: 1784: 1779: 1772: 1767: 1760: 1755: 1748: 1743: 1736: 1731: 1729: 1727: 1725: 1717: 1712: 1697: 1690: 1683: 1676: 1671: 1664: 1659: 1657: 1655: 1647: 1642: 1640: 1638: 1636: 1634: 1632: 1624: 1619: 1617: 1609: 1604: 1602: 1600: 1598: 1596: 1594: 1592: 1590: 1582: 1577: 1575: 1573: 1565: 1560: 1558: 1550: 1545: 1538: 1533: 1526: 1521: 1519: 1510: 1506: 1501: 1496: 1492: 1488: 1484: 1477: 1475: 1473: 1465: 1460: 1458: 1456: 1454: 1452: 1450: 1448: 1446: 1444: 1436: 1431: 1429: 1421: 1416: 1409: 1404: 1398:, p. 63. 1397: 1392: 1385: 1380: 1378: 1376: 1374: 1372: 1364: 1359: 1357: 1355: 1353: 1337: 1333: 1329: 1323: 1321: 1313: 1308: 1306: 1298: 1293: 1291: 1289: 1287: 1285: 1283: 1267: 1263: 1259: 1253: 1251: 1242: 1238: 1234: 1227: 1225: 1216: 1212: 1211: 1206: 1200: 1198: 1196: 1194: 1192: 1190: 1174: 1170: 1166: 1160: 1156: 1147: 1144: 1142: 1139: 1138: 1125: 1120: 1119: 1118: 1116: 1106: 1104: 1100: 1096: 1092: 1085: 1080: 1076: 1071: 1069: 1063: 1050: 1046: 1045:summit crater 1042: 1037: 1034: 1030: 1026: 1016: 1014: 1010: 1006: 1001: 999: 995: 990: 986: 982: 978: 975:which formed 974: 970: 966: 960: 958: 954: 950: 946: 942: 938: 934: 924: 922: 918: 914: 910: 906: 902: 898: 894: 884: 882: 878: 874: 869: 865: 861: 857: 853: 849: 844: 842: 841:calc-alkaline 838: 834: 830: 826: 822: 818: 814: 804: 801: 797: 793: 789: 785: 781: 777: 773: 768: 766: 762: 758: 757:Cerro Ascotan 754: 750: 746: 742: 738: 734: 730: 722: 712: 710: 706: 702: 698: 694: 689: 687: 683: 679: 675: 671: 667: 663: 658: 656: 652: 648: 638: 636: 632: 628: 624: 620: 615: 613: 609: 608:rock glaciers 605: 601: 597: 592: 585: 580: 576: 572: 568: 564: 559: 557: 553: 548: 543: 540: 536: 532: 528: 524: 520: 515: 511: 510:Hot avalanche 507: 503: 499: 494: 491: 486: 484: 480: 476: 472: 467: 463: 459: 454: 452: 448: 444: 440: 436: 432: 428: 424: 420: 417: 413: 408: 404: 399: 395: 392: 388: 384: 380: 376: 372: 368: 364: 360: 357: 347: 345: 344:fumarolically 341: 337: 333: 329: 325: 321: 316: 314: 310: 306: 302: 298: 294: 290: 286: 282: 278: 274: 270: 266: 262: 258: 254: 251: 247: 226: 224: 220: 215: 211: 209: 208:Last eruption 205: 202: 201:Stratovolcano 199: 197: 196:Mountain type 193: 188: 185: 182: 180: 174: 166: 146: 136: 131: 126: 98: 96: 92: 89: 86: 84: 80: 77: 74: 72: 68: 64: 62: 58: 54: 52: 48: 43: 38: 32: 27: 22: 19: 3319: 3315: 3304:. Retrieved 3258: 3254: 3226: 3217:Academia.edu 3215:– via 3210:. Retrieved 3201: 3186:. Retrieved 3145: 3141: 3125:. Retrieved 3084: 3080: 3043: 3001: 2997: 2968: 2964: 2922: 2918: 2877: 2873: 2846: 2842: 2806: 2802: 2787:. Retrieved 2780:ResearchGate 2779: 2742: 2736: 2719: 2715: 2705: 2693:. Retrieved 2686:the original 2660: 2655:, p. 3. 2648: 2615: 2611: 2605: 2580: 2576: 2569: 2558:. Retrieved 2525: 2521: 2511: 2499: 2487: 2446: 2442: 2432: 2420: 2405:. Retrieved 2401:the original 2396: 2338: 2331: 2326:, p. 6. 2319: 2314:, p. 9. 2307: 2302:, p. 6. 2295: 2283: 2271: 2266:, p. 4. 2259: 2232: 2227:, p. 2. 2205: 2193: 2188:, p. 3. 2181: 2169: 2157: 2145: 2133: 2121: 2116:, p. 6. 2109: 2097: 2085: 2080:, p. 2. 2073: 2061: 2049: 2027:, p. 3. 1984: 1980: 1974: 1962: 1957:, p. 5. 1950: 1915: 1911: 1901: 1889: 1877: 1872:, p. 5. 1865: 1860:, p. 5. 1853: 1841: 1829: 1802: 1790: 1778: 1766: 1754: 1742: 1737:, p. 2. 1711: 1699:. Retrieved 1695: 1682: 1670: 1544: 1532: 1490: 1486: 1422:, p. 7. 1415: 1410:, p. 8. 1403: 1391: 1340:. Retrieved 1336:the original 1331: 1299:, p. 1. 1270:. Retrieved 1266:the original 1261: 1232: 1208: 1177:. Retrieved 1168: 1159: 1112: 1072: 1038: 1022: 1002: 961: 930: 890: 845: 831:-containing 819:-containing 810: 769: 765:Aucanquilcha 721:volcanic arc 718: 690: 680:beneath the 659: 644: 616: 593: 567:normal fault 560: 544: 512:deposits or 495: 488:A number of 487: 455: 439:Llullaillaco 425:systems and 409: 353: 338:and a large 317: 287:beneath the 277:Llullaillaco 255:in northern 245: 244: 223:First ascent 178:Parent range 18: 3285:10447/99158 2784:SERNAGEOMIN 2710:Muñoz, J.; 1165:"San Pedro" 1103:SERNAGEOMIN 1082: [ 1039:Presently, 1029:water pipes 1009:radiocarbon 985:Radiometric 852:Plagioclase 848:phenocrysts 807:Composition 796:ignimbrites 780:sedimentary 776:metamorphic 647:Nazca Plate 627:Pleistocene 571:scoria cone 435:Pleistocene 401: [ 336:Pleistocene 334:during the 285:Nazca Plate 120: / 95:Coordinates 71:Parent peak 3376:Categories 3306:2019-06-30 3212:2018-02-25 3188:2017-07-09 3087:(11): 74. 3004:: 102672. 2789:2017-07-09 2712:Moreno, H. 2560:2020-09-07 2528:(2): 108. 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Index


San Pablo
Elevation
Prominence
Parent peak
Ojos del Salado
Listing
Ultra
Coordinates
21°53′16″S 68°23′29″W / 21.88778°S 68.39139°W / -21.88778; -68.39139
San Pedro is located in Chile
Chile
Parent range
Andes
Mountain type
Stratovolcano
Last eruption
First ascent
Holocene
composite volcano
Chile
Andes
Central Volcanic Zone
Andean Volcanic Belt
Ojos del Salado
Llullaillaco
subduction
Nazca Plate
South America Plate
San Pablo

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