Other, later breaking Earth Ice Ages lasted only tens of thousands of years -- up to a few million years -- but this particular Ice Age lasted over 50 million years. Ponder that. [And it seems a "runaway carbon cycle" -- but on the oceans' floor -- was a main factor, yet again.] Here is that item, and a bit:
. . .By tracing how carbon moved between ocean and atmosphere, Trent B. Thomas at the University of Washington (UW) demonstrated that intensified seafloor weathering could hold greenhouse gases low enough to prolong deep freeze conditions for tens of millions of years.
In his simulations, volcanic carbon release remained within the same range for both episodes, yet only the scenario with accelerated ocean-floor reactions reproduced the prolonged glaciation.
That imbalance pointed away from the sky and toward the seabed, setting up the need to understand how the ocean floor gained such outsized control over Earth’s climate clock. . . .
Fascinating. Onward.
नमस्ते
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