Shackleton fracture zone

Scientists in Chile and other countries postulated that the boundary between the southeastern Pacific Ocean and the southwestern Atlantic Ocean was not the Cape Horn meridian, but rather the Shackleton fracture zone mid-oceanic ridge[1] and a submarine orographic chain which links the Tierra del Fuego Archipelago with the Antarctic continent.

[3] The researchers Juan Ignacio Ipinza Mayor and Cedomir Marangunic Damianovic put forward the scientific theory that the separation of the Pacific and Atlantic Ocean oceans "could be confirmed from the so-called Shackleton Fracture Zone (...) the boundary is then located east of the so-called Cape Horn Meridian".

"[2] In 2004 The Geological Society of America in the scientific paper entitled Shackleton Fracture Zone: No barrier to early circumpolar ocean circulation posits that: "the Shackleton Fracture Zone could have blocked the gateway until the early Miocene.

Geophysical and geochemical evidence presented here suggests that the Shackleton Fracture Zone is an oceanic transverse ridge".

[1] This article incorporates public domain material from "Shackleton fracture zone".