Geological sampling during Polarstern Expedition ARK-XXII/2 was performed in two areas on the northern Kara Sea continental margin, along a transect from the Kara Sea across the Gakkel Ridge and the Lomonosov Ridge (at 88°40'N, 140°E) to the Alpha Ridge, and on a shorter transect from the Alpha Ridge transect back to the Lomonosov Ridge at 86°30'N, 152°E (Fig. 7.1). Coring sites were selected based on Parasound results, with emphasis on morphological highs in the central and eastern Arctic Ocean (Lomonosov and Alpha Ridges). Kasten corer PS70/358-4 was recoverd from the Barents Abyssal Plain east of Severnaa Zemlya.