Abrupt Cooling at the Eocene-Oligocene boundary

The Earth has gone through significant climate change over the last 100 million years going from the mid-Cretaceous “greenhouse” to the late Cenozoic icehouse. Roughly 33.7 million years ago, at the Eocene-Oligocene boundary (EOB), the world would begin to develop permanent ice sheets, particularly the East Antarctic. This accompanied the so-called Oi-superglacial driven by a reduction in atmosphere CO2 concentrations.

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