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
History of Franz Josef Land the southern and central parts of the archipelago had been explored. At the time there was a presumption that a large landmass, tentatively called Petermann Land, stretched northwards, possibly all the way to the pole. To the west another landmass was expected, Gillis Land, which it was expected might reach as far as Svalbard. Frederick George Jackson hoped to exploit the previous expeditions' experience with overwintering to launch an expedition to explore the northern parts of the island group. To prepare for the trip, in 1893 he took an expedition to Yugorsky Strait and Vaygach Island, south of Novaya Zemlya.