Tsunamis, wildfires followed dinosaur-killing impact

earthsky.org | 9/17/2019 | Eleanor Imster
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Click For Photo: https://en.es-static.us/upl/2019/09/tsunami-dinosaurs-300x159.jpg

Image via Curtin University.

Scientists have long believed that the end of the dinosaurs came as a result of a giant asteroid that crashed into Earth about 66 million years ago. Now, a new study by an international team of geologists, published in the peer-reviewed journal Proceedings of the National Academy of Sciences on September 9, 2019, has found hard evidence of the theory by analyzing the hundreds of feet of rocks that filled the impact crater within the first 24 hours after impact.

Geologists - Evidence - Impact - Wildfires - Tsunamis

The geologists say the evidence shows that the asteroid impact caused wildfires, triggered tsunamis and blasted so much sulfur into the atmosphere that it blocked the sun, which caused the global cooling that ultimately doomed the non-avian dinosaurs.

The researcher drilled 1,640 to 4,265 feet (500 to 1,300 meters) into the seafloor below the Chicxulub crater off the coast of what’s now Mexico, in order to extract core samples of the rocks which filled the crater within 24 hours after the asteroid hit.

Location - Chicxulub - Crater - Image - Wikipedia

Location of Chicxulub crater. Image via Wikipedia.

Sean Gulick, a research professor at the University of Texas Institute for Geophysics (UTIG) at the Jackson School of Geosciences, is lead author of the study. Gulick said in a statement:

Record - Events - Ground - Zero - Impact

It’s an expanded record of events that we were able to recover from within ground zero. It tells us about impact processes from an eyewitness location.

Curtin University geochemist Kliti Grice is a study co-author. She said:

Impact - Chicxulub - Crater - Yucatán - Peninsula

The asteroid impact that formed the Chicxulub crater on the Yucatán Peninsula in Mexico, where this research was carried out, is thought to be the cause of the late Cretaceous Period mass extinction event which led to 76 per cent of all plant and animal species world-wide, including all non-flying dinosaurs, being killed off.

According to the researchers, most of the material that filled the crater within...
(Excerpt) Read more at: earthsky.org
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