What is the Oldest Sea in the World?
The Pacific Ocean is the oldest of the existing ocean basins.
The Pacific Ocean's oldest rocks are approximately 200 million years old. This makes it the oldest sea currently in existence. While other bodies of water may have existed earlier in Earth's history, the Pacific Ocean, in its current form, boasts the oldest seafloor.
Supporting Evidence
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Multiple Sources: Information from several reputable sources, including NOAA (https://oceanservice.noaa.gov/facts/biggestocean.html), IFLScience (https://www.iflscience.com/the-worlds-oldest-ocean-is-also-the-biggest-and-the-deepest-69273), and Oldest.org (https://www.oldest.org/nature/oceans/), corroborate the Pacific Ocean's age and status as the oldest existing ocean basin.
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Rock Dating: The age determination is based on radiometric dating of rocks found on the Pacific Ocean floor. This scientific method provides a reliable estimate of the age of geological formations.
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Comparison to other Oceans: The Arctic Ocean, for example, is significantly younger, with its oldest parts dating back only 80 to 67 million years (https://www.oldest.org/nature/oceans/).
It is crucial to note that the question focuses on the existing ocean basins. Older bodies of water may have existed earlier in Earth's geological history, but they no longer exist in their original form.
