Before revision: Scientific researchers have proposed the existence of a natural boundary between the Atlantic and Pacific oceans , existing the theory of natural delimitation between the Pacific and South Atlantic oceans by the Shackleton Fracture Zone and the theory of natural delimitation between the Pacific and South Atlantic oceans by the Scotia Arc the former being more current than the latter.
After revision: Scientific researchers have proposed delimiting the boundary between the Atlantic and Pacific oceans by two different natural boundaries, by the Shackleton Fracture Zone and by the Scotia Arc the former being more current than the latter.