SIERRA NEGRA (GALáPAGOS)

'Sierra Negra' is the shield volcano at the southern end of Isabela Island. It contains a shallow 7×10½ km caldera that is the largest in the Galápagos Islands. Although Sierra Negra is the largest of the five major Isabela volcanoes, it has the flattest slopes, averaging less than 5 degrees and diminishing to 2 degrees near the coast. Volcán de Azufre, the largest fumarolic area in the Galápagos Islands, lies within a graben between this ridge and the west caldera wall. Sierra Negra, along with Cerro Azul and Volcán Wolf, is one of the most active of the Isabela Island volcanoes

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External links

External links

★ Smithsonian Institution's Global Volcanism Program - Sierra Negra

★ CBS News: Galapagos Volcano Erupts for Third Day