Oceanic basin an active - and growing - oceanic basin include an elevated mid-ocean ridge, flanking abyssal hills leading down to abyssal plains. The elements of an active oceanic basin often include the oceanic trench associated with a subduction zone. The Atlantic ocean and the Arctic ocean are good examples of active, growing oceanic basins, whereas the Mediterranean Sea is shrinking. The Pacific Ocean is also an active, shrinking oceanic basin, even though it has both spreading ridge and oceanic trenches. Perhaps the best example of an inactive oceanic basin is the Gulf of Mexico, which formed in Jurassic times and has
Hans Nansen Hans Nansen Hans Nansen (28 November 1598 – 12 November 1667) was a Danish statesman. The son of a burgher, Evert Nansen, he was born at Flensburg. He made several voyages to the White Sea and to places in northern Russia, and in 1621 entered the service of the thriving Danish Icelandic Company. For many years the whole trade of Iceland, which he frequently visited, passed through his hands, and he soon became equally well known at Glückstadt, the centre of the Iceland trade, and at Copenhagen. In February 1644, at the express desire of King Christian IV of Denmark,