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Ankaratra Volcano | John Seach
Madagascar
19.40 S, 47.20 E
summit elevation 2644 m
Cinder cones
Ankaratra volcano is located in central Madagascar. Fissure eruptions created a series of tectonic lakes.
Eruptions at Ankaratra volcano have formed extensive lava flows and cones of basalt, basinite and phonolite covering the Ankaratra plateau at elevations of 2300–2700 m.
The most active area of seismicity is beneath the Ankaratra plateau, where numerous minor earthquakes occur annually at depths of 15–28 km, including magnitude 5.2 and 5.5 events in 1985 and 1991.
Further reading
Cucciniello, Ciro, et al. "From olivine nephelinite, basanite and basalt to peralkaline trachyphonolite and comendite in the Ankaratra volcanic complex, Madagascar: 40Ar/39Ar ages, phase compositions and bulk-rock geochemical and isotopic evolution." Lithos 274 (2017): 363-382.
Melluso, L., et al. "The geochemistry of primitive volcanic rocks of the Ankaratra volcanic complex, and source enrichment processes in the genesis of the Cenozoic magmatism in Madagascar." Geochimica et Cosmochimica Acta 185 (2016): 435-452.
Ankaratra Volcano Eruptions
No recent eruptions.