"Over the last 540 million years, the Earth has weathered three major ice ages [each] preceded by tropical “arc-continent collisions” -- tectonic pileups that occurred near the Earth’s equator -- in which oceanic plates rode up over continental plates, exposing tens of thousands of kilometers of oceanic rock to a tropical environment. [The] heat and humidity of the tropics likely triggered a chemical reaction between […] the rocks’ calcium and magnesium […] pulling the [CO2] out of the atmosphere and permanently sequestering it in the form of carbonates such as limestone [cooling] temperatures globally and ultimately [setting] off an ice age."
14 March 2019
Tectonics in the Tropics ~ Ice Age Triggers!
Jennifer Chu of MIT News spotlights recent research indicating that Tectonics in the Tropics Trigger Earth’s Ice Ages...