Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Volcanoes & Earthquakes - app for iPhone & iPad

Guaranteed tours:
11-29 Aug 2020: Kamchatka - Land of Colors - Kamchatka (Russia)
21-31 Aug 2020: Islands of Fire and Whales - Kurile Islands (Russia)
3-19 Sep 2020: Volcanoes of Java - Java (Indonesia)
29 Sep - 5 Oct 2020: Adventure Volcano - Yasur Volcano Travel - Tanna Island (Vanuatu)
10-18 Oct 2020: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
14-27 Nov 2020: Desert, salt and volcanoes - Danakil desert (Ethiopia)
: spaces available / : guaranteed / : few spaces left / : booked out

Support us?


Maintaining the volcano and earthquake news sections on this website, the free Volcano Webcams tool and interactive map widget is a free-time, both time- and server cost intensive effort.
If you find the information useful and would like to support us, and help keep it alive and improve it, please consider making a small donation (PayPal).

Online cc payment
Thank you!
Random pictures
Search for term:

Antisana

Volcano
Antisana volcano is a large, glacier covered stratovolcano 50 km SE Quito, Ecuador. It is located on the eastern margin of the Cordillera Real, at the latitude where the volcanic chain of the Northern Volcanic Zone is widest. Antisana is one of the largest volcanoes and highest peaks in Ecuador. The Antisana complex contains 2 generations of volcanic edifices, an older volcano cut by calderas and eroded by glaciers and a young cone. The only confirmed historical eruption was from 1801 to 1802, when a lava flow was erupted from a vent NNE of the summit. Antisana volcano is iside the Condor Bioreserve as part of the Antisana Ecological Reserve which comprises and area of 296,000 acres.
Volcano typestratovolcano normal or dormant
LocationEcuador
Summit elevation5753 m / 18,874 ft
Antisana volcano eruptions1801-02, 1728(?), 1590(?)
Typical eruption styleexplosive
Antisana volcano was built in at least 2 phases: an older volcano was built above the basement of granitic and metamorphic rocks and forms the SE part of the massif, and still covers two-thirds of the volcano. It is composed of lava flows, numerous volcanic breccias and pyroclastic flow deposits. The activity culminated with 2 large eruptions which formed 2 calderas to the south and east, and the edifice was eroded by glaciers.

The younger volcanic cone, present-day Antisana, forms the NW flank of the massif and is composed by numerous lava flows radiating from the summit.

The region of the North Volcanic Zone around Antisana volcano has a striking lack of intermediate depth seismicity, and the depth of the subducted slab of the Nazca plate underneath Antisana is not known.

Lavas at Antisana are highly porphyritic (contain often >40% modal phenocrysts).



Sources:

- Smithsonian / GVP Antisana volcano information

- Bourdon et al (2002) "Adakite-like Lavas from Antisana Volcano (Ecuador): Evidence for Slab Melt Metasomatism Beneath the Andean Northern Volcanic Zone", J Petrology, v. 43 (2), pp.199-217
 

More on VolcanoDiscovery:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.