Firura

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Firura
Firura is located in Peru
Firura
Firura
Peru
Highest point
Elevation 5,498 m (18,038 ft) [1]
Coordinates 15°14′S 72°48′W / 15.233°S 72.800°W / -15.233; -72.800Coordinates: 15°14′S 72°48′W / 15.233°S 72.800°W / -15.233; -72.800[1]
Geography
Location Arequipa Region,
Peru
Parent range Andean Volcanic Belt,
Andes

Firura is an extinct volcano of the Central Andean Volcanic Belt, located in the Arequipa Region of southern Peru.[1] Together with Sara Sara, Solimana and Coropuna it forms one of the Central Andean volcanoes.[2] It is in the Andes, north of the Pucuncho Basin.

Description[edit]

Two domes form the Firura volcano, which has a low relief of 500 metres (1,600 ft).[1] Lava flows and stratovolcanoes form a 10–12 kilometres (6.2–7.5 mi) long field. Aside from the main summit Firura, there also are Soncco Orcco (5,191 metres (17,031 ft)), Jahsaya (5,144 metres (16,877 ft)) and separating Firura from Solimana Antapuna (4,852 metres (15,919 ft)). The complex has generated basaltic or basaltic andesite lava flows that reach down into inhabited areas, as well as an ignimbrite resulting from the collapse of the ancient crater. Date of last volcanic activity is Pleistocene to Holocene but it doesn't appear to be a major hazard.[3][4][5]

Much of the southern side of the volcano above 5,300 metres (17,400 ft) altitude is covered with perennial snow. A small glacier (>0.5 square kilometres (0.19 sq mi)) is found on the southern summit of Firura and reaches down to 5,255 metres (17,241 ft). This glacier appears to be located above the local equilibrium line altitude.[1]

Firura has well preserved moraine systems. A major moraine system with a relief of 80–100 metres (260–330 ft) was left by the Last Glacial Maximum, although expansion of glaciers on the northern flank was constrained on a high plateau. The prevalent aridity of the climate impedes the degradation of these moraines.[1]

References[edit]

  1. ^ a b c d e f Bromley, Gordon R.M.; Hall, Brenda L.; Rademaker, Kurt M.; Todd, Claire E.; Racovteanu, Adina E. (March 2011). "Late Pleistocene snowline fluctuations at Nevado Coropuna (15°S), southern Peruvian Andes". Journal of Quaternary Science. 26 (3): 305–317. doi:10.1002/jqs.1455. 
  2. ^ Thouret, J.-C.; Wörner, G.; Gunnell, Y.; Singer, B.; Zhang, X.; Souriot, T. (November 2007). "Geochronologic and stratigraphic constraints on canyon incision and Miocene uplift of the Central Andes in Peru". Earth and Planetary Science Letters. 263 (3-4): 151–166. doi:10.1016/j.epsl.2007.07.023. 
  3. ^ de Silva, SL; Francis, PW (March 1990). "Potentially active volcanoes of Peru-Observations using Landsat Thematic Mapper and Space Shuttle imagery". Bulletin of Volcanology. 52 (4): 286–301. doi:10.1007/BF00304100. 
  4. ^ Gómez, Juan Carlos; Siebe, Claus; Sánchez-Nuñez, Juan Manuel; Arce, José Luis; Macías, José Luis. "Caracterizacion geologica de los depositos de avala ncha de escombros en Chuquibamba y Cotahuasi, region Arequipa" (PDF). biblioserver.sernageomin (in Spanish). SERNAGEOMIN. Archived from the original (PDF) on 29 February 2016. Retrieved 29 February 2016. 
  5. ^ "Nevados Firura". Global Volcanism Program. Smithsonian Institution.