New evidence suggests ocean changes preceded the end-Triassic mass extinction by millions of years
By
Silvia Pineda-Munoz PhD
Summary
New evidence suggests that the end-Triassic mass extinction (201 million years ago), which paved the way for dinosaurs to become dominant, may have been preceded by significant environmental changes millions of years earlier. While massive volcanic eruptions and CO2 release were already known causes, recent findings indicate ocean chemistry and ecosystems were destabilizing long before the main extinction event, challenging the traditional timeline of this pivotal moment in Earth's history.
Source
bskyNew evidence suggests ocean changes preceded the end-Triassic mass extinction by millions of yearsclimateages.substack.comKey quotes
· 3 pulledAround 201 million years ago, enormous volcanic eruptions associated with the formation of the Atlantic Ocean released vast amounts of carbon dioxide into the atmosphere.
The climate changed rapidly, oceans warmed, many species disappeared, and ecosystems were reorganized.
By the end of the crisis, roughly half of Earth's species were gone, and dinosaurs emerged from one group among many to become the dominant large animals on the planet.
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