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Ecuador · Vulcano a scudo

Santiago Island

Santiago

Tipo
Vulcano a scudo
Altitudine
920 m
Ultima eruzione
1906
Santiago Island
Foto: obv (talk) · CC BY-SA 3.0 · Wikimedia Commons
Tipo
Vulcano a scudo
Paese
Ecuador
Regione
Pacifico orientale / Galapagos Hotspot Volcano Group
Altitudine
920 m
Coordinate
-0.220, -90.770
Ultima eruzione
1906
Contesto tettonico
Zona di rift / Crosta oceanica (< 15 km)
Forma vulcanica
A scudo
Roccia principale
Basalto / Picrobasalto
Sintesi geologica

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.

Sintesi da Wikipedia

Riassunto in inglese

Santiago Island is one of the Galápagos Islands. The island, which consists of two overlapping volcanoes, has an area of 585 square kilometers (226 mi2) and a maximum altitude of 907 meters (2,976 ft), atop the northwestern shield volcano. The volcano in the island's southeast erupted along a linear fissure and is much lower. The oldest lava flows on the island date back to 750,000 years ago.

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Storia delle eruzioni

3 registrateGlossario
Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni · Usa le frecce per spostarti tra le barre, Invio per aprire
1759~1774 · 1 eruzioni · VEI max. ?1890~1904 · 2 eruzioni · VEI max. 017591788183218611890

Cronologia dettagliata

  1. 1904VEI 0Osservata
    1904-07-02 – 1906-12-15
    SE flank
  2. 1897VEI 0Osservata
    1897-07-02 – fine sconosciuta
    SE flank (Sullivan Bay?)
  3. 1759 (±75 anni)VEI ?Stima geologica
    1759 – fine sconosciuta
    West flank (James Bay)

Vulcani nelle vicinanze

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⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.