The Americas, sea floor topography. Computer graphic of an Earth globe centred on the Americas, generated using satellite and mapping data. The land surface is represented with cloud-free satellite images in natural colours. Digital terrain and bathymetric data are used for the land and seabed contours. Ocean depths are colour-coded: light blue on the shallow continental shelves to darker blue for the deep trenches and abyssal plains. Features include the Rockies and Andes mountain ranges, Pacific seamounts and island chains (left), several subduction trenches, and the Mid-Atlantic Ridge (right). At top is the Arctic Ocean and Greenland.