Massive volcanic eruptions, causing global warming, may have caused the dinosaurs’ extinction.  Research by Professor Gerta Keller at Princeton University in New Jersey show that a series of volcanic eruptions ended at almost exactly the same time as the dinosaurs disappeared.

Professor Keller questions the theory that the dinosaurs were killed by an asteroid that struck the Yucatan Peninsula 65 million years ago, forming the Chicxulub crater; the asteroid landed three hundred thousand years before the dinosaurs became extinct.

Professor Keller and her colleagues found fossils of marine organisms in the Deccan Traps, vast ancient lava flows located on the Deccan Plateau in west-central India. These organisms did not exist until after the dinosaurs became extinct, indicating that all of the marine sediments on top of the lava flows were laid down after the dinosaurs died out. However, Keller says that after looking at the microfossils above and below the impact layer, they discovered that the asteroid’s impact caused no significant environmental changes or extinctions.

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