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The ocean is 4 billion yars old, however due to subduction, the oldest sediment found in the ocean's floor is 180 million years old.
I would like to know how many years old the Pacific Ocean...!
The oldest oceanic crust is in the west Pacific and north-west Atlantic. They are about 180 to 200 million years old.
The reason the Pacific Ocean is shrinking is because of the deep water trenches there, while the Atlantic ocean is getting bigger. In about 500 million years the Pacific will not be there and the Atlantic will be overflowing.
On average, continents are older than ocean basins. Due to the action of plate tectonics, ocean crust is being formed and destroyed continuously. The oldest oceanic crust is about 200 million years old, whereas continents, which are less dense than oceanic crust and tend not to be subducted into the mantle, can be more than 3,000 million years old in places.
Because the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
The oldest ocean, geologically, is the Panthalassa Ocean which was around 220 million years ago in the Triassic era. It encompassed the whole Earth except the land mass Pangea. See related link for more information.
The Baiji dolphin originated around 25 million years ago. It migrated from the Pacific Ocean to the Yangtze River and is now functionally extinct.
Midway Island, located in the Pacific Ocean, was formed around 28 million years ago. The atoll is an unincorporated territory belonging to the United States.
Sacagawea never crossed the Pacific Ocean. It was in 1804 she met Lewis and Clark as they explored the new territory. She traveled with them to the Pacific Ocean, then returned to the plains.
Sockeye Salmon live in the Pacific Ocean for 4 years