De Long Islands
| Native name: Де Лоҥ арыылара Острова Де-Лонга |
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Map of the De Long Islands.
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Map showing the location of the group.
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| Geography | |
| Location | East Siberian Sea |
| Coordinates | 76°39′N 153°39′E / 76.650°N 153.650°ECoordinates: 76°39′N 153°39′E / 76.650°N 153.650°E |
| Archipelago | De Long |
| Total islands | 5 |
| Major islands | Bennett Island |
| Area | 228 km2 (88 sq mi) |
| Highest elevation | 426 m (1,398 ft) |
| Highest point | Mount De Long |
| Administration | |
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Russia
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| Federal subject | Far Eastern Federal District |
| Republic | Sakha |
| Demographics | |
| Population | uninhabited |
The De Long Islands (Yakut: Де Лоҥ арыылара, De Long arıılara; Russian: Острова Де-Лонга, Ostrova De-Longa) are an uninhabited archipelago often included as part of the New Siberian Islands, lying north east of Novaya Sibir.
This archipelago consists of Jeannette Island, Henrietta Island, Bennett Island, Vilkitsky Island and Zhokhov Island. These five islands have a total area of 228 km². Bennett (Bennetta in Russian) Island is the largest island and it has also the archipelago's highest point at 426 m. These islands lie around 77°N, are partially covered by glaciers, and rise to peaks.
In 1996, the total area of these islands covered by ice caps and glaciers was 80.6 km². This island group belongs to the Sakha (Yakutia) Republic administrative division of Russia.
Early Paleozoic, Middle Paleozoic, Cretaceous, and Neogene rocks have been mapped within the De Long Islands. The Early Paleozoic rocks are Cambrian and Ordovician sedimentary rocks interbedded with minor amounts of limestone. The Middle Paleozoic rocks consist of predominately folded and faulted basaltic, andesitic, and dioritic volcanoclastics, tuffs, lavas, dikes, and sills. Cretaceous rocks are composed of basalts and interbedded argillites, sandstones and minor coals. The youngest rocks exposed within the De Long Islands are Neogene basaltic volcanic rocks.
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