Meteor killed dinosaurs with dust, not wildfires, study finds

The video discusses the extinction of dinosaurs, traditionally attributed to wildfires caused by the Yucatan Peninsula impact. A new study suggests that the mass extinction was primarily due to materials ejected from the Chicxulub crater, not wildfires. Researchers analyzed sediment samples, focusing on hydrocarbons, and found that most pollutants came from the crater impact. While wildfires contributed, they were a minor factor in the extinction event.

How did the researchers conclude that the sediment was mostly from the impact crater?

What role did wildfires play in the mass extinction according to the study?