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isola Saint Paul

St. Paul

Stratovulcano · France · 268 m

A small 1.8-km-wide caldera cuts the E side of uninhabited St. Paul Island, as depicted in this plate from the SMS Gazelle expedition. The flooded caldera has 300-m-high walls on the SW side and is narrowly constrained by low spits on the NE. Geothermal areas are located along the caldera rim and along the margins of the caldera bay. The entire NE half of the volcano forming much of the island now lies beneath the sea.
A small 1.8-km-wide caldera cuts the E side of uninhabited St. Paul Island, as depicted in this plate from the SMS Gazelle expedition. The flooded caldera has 300-m-high walls on the SW side and is narrowly constrained by low spits on the NE. Geothermal areas are located along the caldera rim and along the margins of the caldera bay. The entire NE half of the volcano forming much of the island now lies beneath the sea. · Foto: Plate from the SMS Gazelle expedition (courtesy of NOAA Photo Library). · Wikimedia Commons
Tipo
Stratovulcano
Paese
France
Regione
Somalian-Antarctic Volcanic Regions / Amsterdam-St. Paul Hotspot Volcano Group
Altitudine
268 m
Coordinate
-38.720, 77.530
Ultima eruzione
1793
Contesto tettonico
Rift zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

The uninhabited triangular island of St. Paul is located near the axis of the East Indian Ocean Ridge, 80 km S of Amsterdam Island. It is composed of an older tuff cone surmounted by a basaltic stratovolcano with a 1.8-km-wide caldera. The entire NE half of the volcano was submerged following collapse along a NW-trending fault. This breached the central caldera, leaving an 80-m-deep bay connected to the ocean by a narrow channel. Geothermal areas are located near the caldera rim and along the margins of the caldera bay. The only recorded eruption took place in 1793 from a vent on the lower SW flank.

Sintesi da Wikipedia

Île Saint-Paul è una piccolissima isola (8 km²) che fa parte dei territori francesi nell'Oceano Indiano. Si trova a circa 85 chilometri a sud dell'isola di Amsterdam, con la quale forma il distretto di îles Saint-Paul et Nouvelle-Amsterdam, uno dei cinque distretti delle Terre Australi e Antartiche Francesi. A volte visitata per brevi campagne scientifiche o ecologiche, ma senza alcuna popolazione stabile, è un'isola rocciosa, che misura non più di 5 km nel punto più largo ed è completamente priva di alberi.

Wikipedia · CC BY-SA · Leggi l'articolo completo

Storia delle eruzioni

Riepilogo (VEI nel tempo)
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1793~1793 · 1 eruzioni · VEI max. 217931793179417941794

Cronologia dettagliata

  1. 1793VEI 2Osservata
    1793 – In corso
    SW flank (near Cape West)

Link esterni

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