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Isla Santiago

Santiago

Volcán en escudo · Ecuador · 920 m

The elongated shield volcano of Santiago Island is dotted with Holocene pyroclastic cones. Fresh lava flows that blanket the flanks of the volcano originated from these cones. The 920-m-high summit ridge, lined with NW-trending cinder and spatter cones, is seen here from James Bay on the west side of the island. The James Bay lava flows (center) reached the coast along a broad front. They were dated by fragments of marmalade pots left by buccaneers in 1684 that were subsequently embedded in the lava flows observed by Charles Darwin in 1835.
The elongated shield volcano of Santiago Island is dotted with Holocene pyroclastic cones. Fresh lava flows that blanket the flanks of the volcano originated from these cones. The 920-m-high summit ridge, lined with NW-trending cinder and spatter cones, is seen here from James Bay on the west side of the island. The James Bay lava flows (center) reached the coast along a broad front. They were dated by fragments of marmalade pots left by buccaneers in 1684 that were subsequently embedded in the lava flows observed by Charles Darwin in 1835. · Foto: Photo by Lee Siebert, 1978 (Smithsonian Institution). · Wikimedia Commons
Tipo
Volcán en escudo
País
Ecuador
Región
Eastern Pacific Volcanic Regions / Galapagos Hotspot Volcano Group
Altitud
920 m
Coordenadas
-0.220, -90.770
Última erupción
1906
Contexto tectónico
Rift zone / Oceanic crust (< 15 km)
Forma volcánica
Shield
Roca principal
Basalt / Picro-Basalt
Resumen geológico

The elongated shield volcano of Santiago Island, also known as San Salvador Island or James Island, has numerous scattered Holocene pyroclastic cones. Fresh-looking lava flows from these cones cover the flanks. The summit ridge, lined with a chain of NW-trending cinder and spatter cones, is located at the NW end of the island. Prominent flank tuff cones occur at the western and eastern coasts. The most recent activity has been concentrated at the NW and SE ends of the island. The pahoehoe lava flows at James and Sullivan Bays, on opposite ends of the island, were erupted in the past few hundred years. The James Bay flows were dated by fragments of marmalade pots left by buccaneers in 1684 that were subsequently embedded in the lava flows described by Charles Darwin in 1835.

Resumen de Wikipedia

La isla Santiago es parte del archipiélago de las islas Galápagos, Ecuador. Es la cuarta en extensión territorial, con 585 km², dominada por un domo volcánico de 907 m, el cerro Cowan, roreada de pequeños conos al noroeste. La vegetación, excepto por matorrales de Mollugo crockeri, plantas de la sal y algunos cactus de la especie Brachycereus nesioticus, es muy escasa.

Wikipedia · CC BY-SA · Leer artículo completo →

Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
1759~1774 · 1 erupciones · VEI máx. ?1890~1904 · 2 erupciones · VEI máx. 017591788183218611890

Línea de tiempo detallada

  1. 1904VEI 0Observado
    1904 – 1906-12-15
    SE flank
  2. 1897VEI 0Observado
    1897 – En curso
    SE flank (Sullivan Bay?)
  3. 1759 (±75 años)VEI ?Estimación geológica
    1759 – En curso
    West flank (James Bay)

Enlaces externos

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