These two dating studies left it unclear as to which scenariothe asteroid or the eruptionsled to the mass extinction.
These results were then cross-referenced to paleotemperature records corresponding to the K/Pg extinction event.
A number of species moved toward the North and South poles but moved back well before the asteroid impact.
A portion of the Deccan Traps in India.Image: (Planet Labs, Inc.)
Overall, I am very impressed with this study, said Sprain.
The authors put a lot of effort into this study and it shows.
However, I dont think the cause of the end-Cretaceous mass extinction is a closed book, said Sprain.
Oddly, no evidence exists to suggest Earth experienced a warming period as a result of these greenhouse gases.
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