What ancient sediments at the bottom of the ocean can teach us about climate change
By Rachel Duckett, Dec. 20, 2025 Columbia University researchers are using grains of sediment left behind on the ocean floor millions of years ago to track the movement of icebergs through the Southern Ocean’s “Iceberg Alley,” just east of the Drake Passage between the southern tip of South America and Antarctica. As icebergs broke off …
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