Amundsen Basin Basin formed during the Cenozoic Era from seafloor spreading. 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
Argentine Basin Antarctic Bottom Water current, which dominates the circulation in the abyssal layer of the southwest Atlantic, enters the southwest part of the Argentine Basin, then is deflected northward along the continental rise. It passes into the Brazil Basin through the Vema Channel (39° 30′ W) to the west of the Rio Grande Rise. Here, the current reaches velocities of 20–25 cm/s. Argentine Basin The Argentine Basin is a region of the Atlantic Ocean floor off the east coast of Argentina, between the Mid-Atlantic Ridge to the east and the Scotia Basin to the west. To the north is the Brazil