Duportail

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Duportail / Lolobau Island
NASA satellite image of Lolobau and the offshore island of Tiwongo.
NASA satellite image of Lolobau and the offshore island of Tiwongo.
Waters Bismarcksee
Archipelago Bismarck Archipelago
Geographical location 4 ° 55 ′ 0 ″  S , 151 ° 10 ′ 0 ″  E Coordinates: 4 ° 55 ′ 0 ″  S , 151 ° 10 ′ 0 ″  E
Duportail (Papua New Guinea)
Duportail
surface 56 km²
Highest elevation Mount Lolobau
858  m

Duportail (also Lolobau Island , Bassulasula , Namisoko , Namsoko ) is a sparsely populated island north of the coast of New Britain in the Bismarck Archipelago , which belongs to Papua New Guinea , West New Britain province and covers an area of ​​about 56 km².

The island was named after the French naval officer Jacques-Malo La Motte du Portail , who took part in the South Seas voyages under the leadership of Joseph Bruny d'Entrecasteaux in the late 18th century .

A small island ( Tiwongo Island, Close Island) with an area of ​​about 0.3 km² is located off its southeastern coast . Two other islands are located about 7 kilometers west of it in the Bismarcksee . They are called Muli Island and Banban Island.

The island has a single main elevation, which is formed by a volcanic cone , Mount Lolobau (858 m), with the Hulu crater. This cone rose from a caldera and is therefore of the Somma volcano type . A remnant of this caldera has been preserved as a small lake (Namor Lake) on the south coast. The last known eruption occurred in 1912. A smaller secondary cone (Giwu Peak) is located in the southeast part of the island.

The slopes of the mountain and the flat coastline are completely forested.

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