The east coast of south america has boarder continental self than its western cost

Banibrata majumder

As to the Pacific or “West” Coast of both North America, Canada and ever South America, the tectonic plate movement is the type that moves under the adjacent continental shelf. Picture that huge plate, which rotes north and west, as an actual plate, with relation to North America, it is the Explorer Plate. This Pacific plate has a divergent boundary with the Explorer Plate off the west coast of Vancouver Island, Canada. The eastern and southeastern parts of the Pacific Plate jostles against the Juan de Fuca, Cocos, and Nazca Plates, which are subducting under the North American Plate. In moving under the adjacent coastline, it actually shrinks that coast line!! Usually by a destructive attrition. Picture all this (now) offshore islands, just the ones from Santa Catalina to Victoria Island and the scattered islands off Seattle. They used to be the “coastline” of the West Coast. Conversely, this Pacific Plate generally “adds” types of land forms on its far-western edge. Near the west center of this great movement lies that Mariana Trench, with its amazing “Deep,” called after the scientific ship that identified it: “The Challenger Deep.” Using the above description, picture the three smaller rotating plates in the Atlantic. Currently, the Atlantic has three isolated subduction zones: the Lesser Antilles in the Caribbean, the Scotia Arc in the South Atlantic, and the Gibraltar Arc in the Mediterranean. They are moving in the same manner, which means they are adding to the North American Edge, meaning that Canada and waters north of that coast in general, are growing. Refer to Greenland, which was most likely deposited in very ancient times. Due to the lesser distances between North Africa and the Eastern tip of South America, many oceanographers now believe that - in the distant future - THE ATLANTIC OCEAN WILL BE CLOSED!!