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Wallis Islands   »  Summary

Wallis Islands

Wallis Islands Photo

Country:France
Subregion Name:Southwestern Pacific Ocean
Volcano Number:0404-05-
Volcano Type: Shield volcanoes
Volcano Status:Holocene
Last Known Eruption: Unknown
Summit Elevation: 143 m 469 feet
Latitude: 13.30°S 13°18'0"S
Longitude: 176.17°W 176°10'0"W

The Wallis Islands consist of one relatively large island, 7 x 14 km Uvea Island, and 22 smaller islands and islets that are surrounded by a barrier reef. The low, forested islands, formed of flat-lying basaltic lava flows that are cut by explosion craters and capped by tuff cones and cinder cones, reach a maximum height of only 143 m above sea level. Numerous small shields (lava cones) and tuff cones are considered on morphological grounds to be of Pleistocene to Recent age (Stearns, 1945). Potassium-Argon ages of dated samples range from 0.5 to 0.08 million years old, but rocks of Pleistocene or Holocene age are present (Price et al., 1991).

Global Volcanism ProgramDepartment of Mineral SciencesNational Museum of Natural HistorySmithsonian Institution

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