Nature & Environment
When did the largest ocean current on Earth start?
...open. The two gateways impeding circumpolar flow were the Drake Passage and the Tasman Gateway. The Tasman Gateway, between Australia and Antarctica, is thought to have opened shallowly approximately 50 million years ago. Drake Passage is the stretch of water between the tip of South America and the Antarctic Peninsula. As tectonic plates spread apart from each other 50...