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The mass extinction that opened the door for the rise of the dinosaurs about 201 million years ago may have been caused by a spike in carbon pumped into the atmosphere — most likely by methane released from the seafloor, a new study indicates.
This spike appears to have accelerated the climate change already under way, ultimately leading to the end-Triassic extinction, the researchers say.
Scientists already suspected that rapid warming and changes to ocean chemistry at the time killed off the dinosaurs' competitors, allowing their era to begin. And they knew that, at the time, eruptions of lava through fissures in the Earth's crust pumped carbon dioxide into the atmosphere.
Since humans are now pumping a great deal of greenhouse gas into the atmosphere, it is conceivable history could repeat itself, Ruhl said, if global warming prompts the release of methane currently stored in the seafloor.
Originally posted by Kryties
Volcanoes my hairy butt. Everyone knows the dinosaurs went extinct because they pumped carbon in the air from their factories and drove around in petrol guzzling cars.
The final nail in the coffin for them was their introduction of a Jurassic Carbon Tax. It all went downhill from there.....
there are several competeing theories about the cause of the the permian triassic event, 1) a massive release of methane into the atmosphere,2) a massive release of CO2 into the atmosphere, 3) a massive release of hydrogen sulfide, and 4)massive vulcanism( the large igneous province eruption that caused the siberian traps),5)an extreme acidification of the oceans by a massive release of sulfur and CO2 into the atmosphere(it caused there to be a layer of sulfuric/carbonic acid several feet deep on the oceans surface.
4)massive vulcanism( the large igneous province eruption that caused the siberian traps)
2) a massive release of CO2 into the atmosphere
1) a massive release of methane into the atmosphere
Under the right conditions, bacteria on the ocean floor tuck it away, but warming caused by the emission of carbon dioxide could have prompted the release of their methane. In the atmosphere, the methane would have caused more warming, and hence the release of more methane, creating a feedback, he said.