Baltica data makes it difficult to locate the margin in the Arctic. Ordovician faunas indicate that most of Svalbard, including Bjørnøya, was part of Laurentia, but Franz Josef Land and Kvitøya (an eastern island of the Svalbard archipelago) most likely became part of Baltica in the Timanide Orogeny. The Taymyr Peninsula, in contrast, never was part of Baltica: southern Taymyr was part of Siberia whilst northern Taymyr and the Severnaya Zemlya archipelago were part of the independent Kara Terrane in the early Palaeozoic. The eastern margin, the Uralide orogen, extends from the Arctic Novaya Zemlya archipelago to the Aral Sea. The
Yuzhny Island is known for its large seabird population. The island's vegetation largely subsists on tundra. Yuzhny Island Yuzhny () is the southern island of the Novaya Zemlya archipelago, lying north of Russia. It has an area of , which while smaller than the northern island of Severny, makes it one of the largest islands in the world. It is separated from Severny Island by the narrow Matochkin Strait, which is covered with ice most of the year. West of Yuzhny Island lies the Barents Sea, and to the east the Kara Sea. Originally home to the Nenets people, the island was