Close examination of Zealandia, a sunken continent 1 km below the surface of the Pacific, which includes the Campbell Plateau and the Chatham Rise, will reveal a huge valley between them and the outlines of a river system running down to the 4 km depth level.
Close examination of Zealandia, a sunken continent 1 km below the surface of the Pacific, which includes the Campbell Plateau and the Chatham Rise, will reveal a huge valley between them called the Bounty Trough. The valley contains what appears to be the outline of a river system running down to below the 4 km depth level.