Ecuador · Vulcano a scudo
Marchena Island
Marchena
- Tipo
- Vulcano a scudo
- Altitudine
- 343 m
- Ultima eruzione
- 1991
- Tipo
- Vulcano a scudo
- Paese
- Ecuador
- Regione
- Pacifico orientale / Northern Galapagos Volcanic Province
- Altitudine
- 343 m
- Coordinate
- 0.330, -90.470
- Ultima eruzione
- 1991
- Contesto tettonico
- Zona di rift / Crosta oceanica (< 15 km)
- Forma vulcanica
- A scudo
- Roccia principale
- Basalto / Picrobasalto
Sintesi geologica
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.
Sintesi da Wikipedia
Riassunto in ingleseMarchena Island is one of the Galapagos Islands in Ecuador. It has an area of 130 square kilometers (50 sq mi) and reaches an elevation of 343 meters (1,125 ft) above sea level. The island does not receive visitors, although the surrounding water is used by aquatic divers on organized tours. People generally see the island as they sail around the northern part of Isabela on the way to Genovesa Island.
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Storia delle eruzioni
1 registrateGlossarioCronologia dettagliata
- 1991VEI 2Osservata1991-09-25 – 1991-11-16West to SW caldera rim
Vulcani nelle vicinanze
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.