Arctic Ocean gas reserves, and the Chukchi shelf forms the border between Russian and the United States as stated in the USSR–USA Maritime Boundary Agreement. The whole area is subject to international territorial claims. An underwater ridge, the Lomonosov Ridge, divides the deep sea North Polar Basin into two oceanic basins: the Eurasian Basin, which is between deep, and the Amerasian Basin (sometimes called the North American, or Hyperborean Basin), which is about deep. The bathymetry of the ocean bottom is marked by fault block ridges, abyssal plains, ocean deeps, and basins. The average depth of the Arctic Ocean is . The
Fridtjof Nansen had spoken out on the issue on several occasions in defence of Norway's interests. It seemed, early in the 20th century that agreement between the two countries might be possible, but hopes were dashed when negotiations broke down in February 1905. The Norwegian government fell, and was replaced by one led by Christian Michelsen, whose programme was one of separation from Sweden. In February and March Nansen published a series of newspaper articles which placed him firmly in the separatist camp. The new prime minister wanted Nansen in the cabinet, but Nansen had no political ambitions. However, at Michelsen's request