In 1959-1961 it was the base of operation for The Polar Continental Shelf Project administered by the then Department of Mines and Technical Surveys now Natural Resources Canada; Polar Shelf as it was known supports research throughout the Arctic, it is now based in Resolute. In the late 1970s there was also a fair amount of oil exploration with a new runway built in the vicinity of the Isachsen Dome; no significant amount of gas or oil was reportedly found. Ellef Ringnes Island was the last landmass to be visited by the Earth's wandering north magnetic pole. In April and May 1994, Larry Newitt, of the Geological Survey of Canada, and Charles Barton, of the Geoscience Australia, conducted a survey to determine the average position of the north magnetic pole at that time. They established a temporary magnetic observatory on Lougheed Island, close to the predicted position of the pole. They determined that the average position of the north magnetic pole in 1994 was located on the Noice Peninsula, southwest Ellef Ringnes Island, at . Geology The island is characterized by broad lowlands and locally by dissected uplands which reflect the diversity of structures and lithological characters of the bedrock formations. The island is rimmed by low shelving coastal areas, domal structures (salt dome) with cores of diapiric anhydrite and secondary gypsum constitute striking features of the landscape. Two major structural provinces of the Arctic Archipelago are represented: the Sverdrup basin which includes the greater part of the island and preponderant thickness of sediments: and the Arctic Coastal Plain, an area at the north-eastern extremity of the island. These salt domes create the highest topographic features. While most of the island is flat lying, the salt domes stand out clearly on satellite. There are seven domes, Dumbbells, Contour, Hoodoo, Malloch, Haakon, Helicopter and Isachsen Dome () which is the highest point on the island. On the north part of the island, there is a concentration of gabbro and diabase dikes and sills. Most of the rock is Jurassic to Cretaceous with the northern part (Isachsen Peninsula) being Tertiary. The Jurassic and Cretaceous rocks are varying formations of sandstone and shale. The sediment was deposited in the Sverdrup Basin. The salt diapirs are Carboniferous. Flora and fauna Ellef Ringnes Island is interesting to biologists because of its extremely rigorous Arctic environment and its resulting meagre flora and fauna. Together with Amund