Amundsen Basin Amundsen Basin The Amundsen Basin, with depths up to 4.4 km, is the deepest abyssal plain in the Arctic Ocean. The Amundsen Basin is embraced by the Lomonosov Ridge (from to ) and the Gakkel Ridge (from to ). It is named after the polar researcher Roald Amundsen. Together with the Nansen Basin, the Amundsen Basin is often summarized as Eurasian Basin. The Russian-American cooperation Nansen and Amundsen Basin Observational System (NABOS) aims "to provide a quantitative observationally based assessment of circulation, water mass transformations, and transformation mechanisms in the Eurasian and Canadian Basins of the Arctic Ocean". The Amundsen
Chamberlain Basin Individual lakes do not have official names and are listed from lowest to highest elevation. Chamberlain Basin Chamberlain Basin is a drainage basin that contains a chain of ten alpine and glacial Paternoster lakes in Custer County, Idaho, United States, located in the White Cloud Mountains in the Sawtooth National Recreation Area. Lakes are located on the upper portion of Chamberlain Creek in the Germania Creek watershed, a tributary of the East Fork Salmon River. Castle Peak, the highest summit in the White Cloud Mountains, rises to the east and north of Chamberlain Basin. Sawtooth National Forest trail 047 crosses