New Siberian Islands Islands (228 km²) lie to the north-east of Novaya Sibir. The New Siberian Islands are low-lying. Their highest point is located on Bennett island, with an elevation of 426 m. The New Siberian Islands once formed major hills within the Great Arctic Plain that covered the northern part of Late Pleistocene "Beringia" between Siberia and Alaska during the Last Glacial Maximum (Late Weichselian Epoch). These islands represent the remains of about 1.6 million square kilometers of the formerly subaerial Great Arctic Plain that now lies submerged below parts of the Arctic Ocean, East Siberian Sea, and Laptev Sea. At this
East Siberian Sea southwest to northeast, covered in a mixture of silt, sand and stones and lacking significant depressions and elevations. About 70% of the sea is shallower than 50 m, with predominant depths of 20–25 m. North-east to the mouth of the Kolyma and Indigirka rivers, there are deep trenches on the seabed, which are attributed to the ancient river valleys, now submerged by the sea. The region of small depths in the western part forms the Novosibirsk shoal. The greatest depths of about 150 m are found in the north-eastern part of the sea. The climate is polar and is influenced