This area is divided in two by the Lena River(1) and its basin. The basin is wider in the south--even wider beyond this area, then narrow, and finally ends in a large delta on the Laptev Sea. West of the delta the flat land continues as the North Siberian Lowland(2), which extends beyond Sakha. South of this is a large part of the Central Siberian Plateau(3) with altitudes generally in the mid hundreds of meters.
East of the river is the Verchojansk Range(4) with peaks over 2,000 meters. Beyond it is the high basin of the Jana(5) and then the Chersky Mountains(7), which do not reach the Arctic Ocean, and rise to over 3,000 meters. Next is the Indigirka Basin, partly separated by plateaus under 1,000 meters from the Kolyma Lowland(7).
North of the mainland are the New Siberian Islands, which separate the Laptev and East Siberian Seas.
(1) Asia's seventh longest.
(2) In transliterated Russian: Severo-Sibirskaja (Sibirskaya) Nizmennost'. Also called the Khatanga Depression.
(3) In transliterated Russian: Sredne-Sibirskoje (Sibirskoye) Ploskogorje (Ploskogorye).
(4) In transliterated Russian: Verchojansjij (Verkhoyanskiy) Chrebet (Khrebet).
(5) Also transliterated from Russian as Yana.
(6) In transliterated Russian: Khrebet (Chrebet) Cherskogo (Cerskogo, with a diacritical on the c) or Cherskiy Khrebet.
(7) In transliterated Russian: Kolymskaja (Kolymskaya) Nizmennost'.