By ExploreNow Editor, on February 18th, 2012%
Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 4709 m 15,449 feet
Latitude: 36.58°S 36°35’0″S
Longitude: 70.42°W 70°25’0″W
Volcán Domuyo is a 4709-m-high Argentinian stratovolcano of late-Pleistocene or possibly Holocene age. At least 14 dacitic lava domes and other eruptive centers were constructed within a broad 15-km-wide caldera, and at least another 5 lie outside the caldera. The largest of the latter is Volcán Chanque-Mallín on the ESE flank. It is truncated by a 4-km-wide caldera and contains a resurgent dome.
Originally posted 2010-11-08 04:45:51.
By Volcano Explorer, on February 5th, 2012%
 Maipo Volcano Type: Caldera
Volcano Status: Stratovolcano
Last Known Eruption: 1908
Summit Elevation: 5264 m 17,270 feet
Latitude: 34.161°S 34°9’38″S
Longitude: 69.833°W 69°49’58″W
Maipo is a stratovolcano in the Andes, lying on the border between Argentina and Chile. It is located 90 km (55 miles) south of Tupungato and about 100 km (60 miles) southeast of Santiago.
Maipo retains a symmetrical, conical volcanic shape, unlike many of the other nearby peaks, making it the best known peak in the region, though it is not the highest. (Nearby Castillo is 5,485 m high.) Maipo is also almost the southernmost 5,000 metre peak in the Andes. (That honor goes to Sosneado, about 50 km to the south).
 Maipo 2 Maipo is located within the Diamante Caldera, a feature of about 15 km by 20 km size that is about one-half million years old. It rises about 1,900 m (6,230 ft) above the floor of the caldera. Immediately to the east of the peak, on the eastern side of the caldera floor, is Laguna del Diamante, a picturesque lake that formed when lava flows blocked drainage channels from the caldera in 1826. The Diamante Caldera erupted 450 cubic kilometers (108 cu mi) of tephra, 450 ka.
The region’s climate is transitional between the drier Mediterranean climate of the peaks to the north and the cold, moist climate of Chilean Patagonia. Hence, while less glaciated than Patagonia, it has more permanent snow (on the wet, Chilean side) than peaks of similar elevation to the north.
 maipo 3 Originally posted 2011-04-16 23:31:12.
By Volcano Explorer, on January 28th, 2012%
 Tuzgle Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 5,500 m (18,044 ft)
Latitude: 24.05°S 24°3’0″S
Longitude: 66.48°W 66°29’0″W
The easternmost young stratovolcano of the central Andes, Cerro Tuzgle, is located in Argentina about 120 km east of the main volcanic arc. Many youthful-looking flank lava flows were erupted from the well-preserved summit crater. Schwab and Lippolt (1976) obtained a Potassium-Argon date of 0.1 million years ago on what they believed to be the youngest lava from Cerro Tuzgle. However, de Silva and Francis (1991) and González-Ferrán (1995) considered the latest activity to be of Holocene age, and Coira and Kay (1993, Fig. 2B) placed the youngest flow at the Pleistocene-Holocene boundary. Activity began with the eruption of a rhyodacitic ignimbrite, followed by construction of a lava dome complex on the rim of an existing caldera. Andesitic lava flows covered much of the dome complex and later partially filled the crater. Several edifice-collapse events occurred during the evolution of the volcano. The youngest flows were erupted on the SE and SW flanks.
 Cerro Tuzgle Originally posted 2011-04-15 19:48:41.
By ExploreNow Editor, on January 20th, 2012%
Volcano Type: Stratovolcano
Volcano Status: Holocene?
Last Known Eruption: Unknown
Summit Elevation: 5447 m 17,871 feet
Latitude: 25.08°S 25°5’0″S
Longitude: 68.37°W 68°22’0″W
Cerro Escorial, a small andesitic-dacitic stratovolcano, has young-looking lava flows and a well-preserved crater. It is the youngest volcanic center of the NW-SE-trending Corrida de Cori range that marks the Chile/Argentina border. Cerro Escorial is located 4 km NE of an active sulfur mine in older, extensively hydrothermally altered rocks. Very youthful-looking lava flows extend westward 3-4 km over an ignimbrite deposit on the Chilean side.
A 1-km-wide crater caps the summit. Cerro Escorial was considered by de Silva and Francis to be of probable Holocene age based on morphological evidence, but Richards and Villeneuve obtained an Ar/Ar age of about 0.342 million years on a lava flow from Cerro Escorial. Most of the lava flows extend to the SW into Chile, but a few small lobes traveled NE on the Argentinian side of the volcano. De Silva noted that the well-preserved summit crater postdates the lava flow and could be of Holocene age.
Originally posted 2010-11-03 03:49:47.
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