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The Galapagos volcano Alcedo; a unique ocean caldera
Journal article   Peer reviewed

The Galapagos volcano Alcedo; a unique ocean caldera

A. R. McBirney, A. B. Cullen, D. Geist, E. P. Vicenzi, Robert A. Duncan, M. L. Hall and M. Estrella
Journal of volcanology and geothermal research, Vol.26(1-2), pp.173-177
01/01/1985
DOI: https://doi.org/10.1016/0377-0273(85)90052-6

Abstract

Alcedo basalts calderas composition East Pacific Ocean Islands Galapagos Islands glasses Igneous and metamorphic petrology igneous rocks obsidian pumice pyroclastics rhyolitic composition tholeiitic composition volcanic features volcanic rocks volcanism volcanoes volcanology
Alcedo is the smallest and one of the least active volcanoes in the Isla Isabela, the largest on the E Pacific Galapagos platform. Its only recorded eruption, in November 1954, produced olivine tholeiites and ferrobasalts together with sodic rhyolites. No intermediate rocks were found.

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