Saltar al contenido principal

Isla Marchena

Marchena

Volcán en escudo · Ecuador · 343 m

A large tuff cone rises near Punta Calle on the southern coast of Marchena Island beyond fresh-looking lava flows west of the cone in the foreground.  The low shield volcano forming Marchena Island contains one of the largest calderas of the Galápagos Islands.  In contrast to other Galápagos volcanoes, the 6 x 7 km caldera and its outer flanks have been largely buried by a cluster of pyroclastic cones and associated lava flows.  The first historical eruption of Marchena occurred in 1991.
A large tuff cone rises near Punta Calle on the southern coast of Marchena Island beyond fresh-looking lava flows west of the cone in the foreground. The low shield volcano forming Marchena Island contains one of the largest calderas of the Galápagos Islands. In contrast to other Galápagos volcanoes, the 6 x 7 km caldera and its outer flanks have been largely buried by a cluster of pyroclastic cones and associated lava flows. The first historical eruption of Marchena occurred in 1991. · Foto: Photo by Ed Vicenzi, 1984 (Smithsonian Institution). · Wikimedia Commons
Tipo
Volcán en escudo
País
Ecuador
Región
Eastern Pacific Volcanic Regions / Northern Galapagos Volcanic Province
Altitud
343 m
Coordenadas
0.330, -90.470
Última erupción
1991
Contexto tectónico
Rift zone / Oceanic crust (< 15 km)
Forma volcánica
Shield
Roca principal
Basalt / Picro-Basalt
Resumen geológico

The low shield volcano forming Marchena Island contains one of the largest calderas of the Galápagos Islands. The 6 x 7 km caldera and its outer flanks have been largely buried by a cluster of pyroclastic cones and associated lava flows. Its first historical eruption occurred in 1991. Other young lava flows, some of which may be only a few thousand, or even a few hundred years old, filled the caldera and flowed down its outer forested flanks, in some cases to the sea.

Resumen de Wikipedia

La isla Marchena es una isla perteneciente a Ecuador, ubicada en el centro de las islas Galápagos, en el océano Pacífico. Llamada en honor del monje español fray Antonio de Marchena, tiene una superficie de 130 km², lo que la convierte en la séptima isla más grande del grupo, y posee una altitud máxima de 343,5 metros.

Wikipedia · CC BY-SA · Leer artículo completo

Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1991~1991 · 1 erupciones · VEI máx. 219911991199219921992

Línea de tiempo detallada

  1. 1991VEI 2Observado
    1991-09-25 – 1991-11-16
    West to SW caldera rim

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.