English: Severnaya Zemlya is an archipelago in the Russian high Arctic. It was first charted in 1930, making it the last large archipelago on Earth to be explored. It consists of four main islands: October Revolution, Bolshevik, Komsomolets, and Pioneer. All are mostly glaciated; the glaciers have a characteristic dome shape. This image of the center of October Revolution Island shows two of these glaciers. The ice-free areas between the glaciers expose folded sedimentary rocks. The image was acquired September 18, 2012, covers an area of 45.6 by 48.3 kilometers, and is located at 79.8 degrees north, 96.1 degrees east.