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The andesitic-to-dacitic Nabukelevu lava-dome complex occupies the SW end of Kadavu Island at the southern end of the Fiji archipelago. The high point of the Nabukelevu complex is 805 m Mt. Washington, an andesitic lava dome. Flat-lying dacitic lava flows are found at Cape Washington along the west coast and at Talaulia Bay on the NE coast. NNE-trending faults cut the complex in several locations and define its eastern boundary. The dome complex is cut by several collapse scarps that were the source of debris avalanches that have incorporated human artifacts and remains. Debris avalanches have entered the sea on the both the northern and southern sides of the volcano. Onshore and offshore deposits as well as native legends indicate that several eruptions have occurred at Nabukelevu during the Holocene. Block-and-ash flows related to dome growth have occurred within the past few hundred years.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1660 ± 30 years||Unknown||Confirmed||Radiocarbon (corrected)||Dome NW of summit|
|0340 (?)||Unknown||Confirmed||Radiocarbon (corrected)||West side of summit dome complex|
|0580 BCE ± 300 years||Unknown||Confirmed||Radiocarbon (corrected)||Summit lava dome|
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|Feature Name||Feature Type||Elevation||Latitude||Longitude|
|Washington, Mount||Dome||805 m||19° 7' 0" S||177° 59' 0" E|
|Nabukelevu volcano, whose summit lies between the two clouds near the center of this NASA Space Shuttle image, occupies the SW end of Kadavu Island at the southern end of the Fiji archipelago. Debris avalanches from collapse of the Mt. Washington lava-dome complex reached both the northern coast to the right of Cape Washington (the small peninsula at the upper left) and horseshoe-shaped Daviqele Bay (bottom center) and the south. Block-and-ash flows related to dome growth have occurred within the past few hundred years.
NASA Space Shuttle image ISS006-E-7466, 2002 (http://eol.jsc.nasa.gov/).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Cronin S J, Ferland M A, Terry J P, 2004. Nabukelevu volcano (Mt. Washington), Kadavu - a source of hitherto unknown volcanic hazard in Fiji. J Volc Geotherm Res, 131: 371-396.