25°15′S67°50′W / 25.250°S 67.833°W / -25.250; -67.833[1]Cerro Archibarca is a volcano in the Andes. It covers a surface area of 20 square kilometres (7.7 sq mi). Lava flows descend from a conical edifice.: 19 [2] It was active 11 million years ago.[3] The youngest deposits are eroded andesites on the northern side.[4]
A major volcaniclastic unit is associated with Archibarca, named the La Torre formation after the valley where its lower bright red unit reaches a thickness of 20 metres (66 ft). The red unit is formed from unconsolidated pyroclastics with spherical clasts (3 centimetres (1.2 in) up to 10 centimetres (3.9 in)). Granite and pumice are materials also present in this unit. The upper white unit is a thick pyroclastic flow from Archibarca. A 30 metres (98 ft) thick rhyolitic flow with banding structures is also present as well as an associated lava dome that intruded the La Torre formation on the volcano's southern side.[4]
Andesites from this volcano are partly derived from crustal assimilation, with the crustal component constituting 40% of total rock.: 103 [2] The Caballo Muerto and Archibarca ignimbrites may be derived from this volcano.[5]
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25°15′S 67°50′W / 25.250°S 67.833°W / -25.250; -67.833 CerroArchibarca is a volcano in the Andes. It covers a surface area of 20 square kilometres...
one hundred 6000m peaks in the Andes and nearly 900 peaks over 5000 m. "Cerro Amaculla (CHL) Feature -872055". geonames.nga.mil. Retrieved 25 September...
lasted until 1 million years ago. Cerro Escorial rises from the Puna, which is dissected at Cerro Escorial by the Archibarca lineament; it is a strike-slip...
The Diablillos-Galán fault zone intersects a volcanic lineament named Archibarca-Ratones beneath the volcano. The age of the volcano is equivocal; Oligocene...
Ordovician marine sediments and dacitic lavas from the adjacent Cerro Bayo de Archibarca (7.2 million years old) volcano. These cones are aligned submeridionally...
2002). "Characteristics of late Cenozoic volcanism along the Archibarca lineament from Cerro Llullaillaco to Corrida de Cori, northwest Argentina". Journal...
Antofalla and Galán. This lineament is known as "Archibarca lineament". Cerro Corrida de Cori and Cerro Negro are associated with the intersections between...
chain by tectonic movements. Antofalla together with neighbouring CerroArchibarca, Cerro Beltrán and Tebenquicho is part of a group of long lived volcanic...
2002). "Characteristics of late Cenozoic volcanism along the Archibarca lineament from Cerro Llullaillaco to Corrida de Cori, northwest Argentina". Journal...
Fraile faults cross at Lazufre, and a major geological lineament named Archibarca traverses the volcanic arc there. The elliptical shape of Lazufre may...
composition to that beneath Lascar. A major crustal lineament known as the Archibarca lineament intersects the main volcanic arc at Lastarria. Other volcanic...
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