"The leading theory recently has been that sulfur from the asteroid's impact—or soot from global wildfires it sparked—blocked out the sky and plunged the world into a long, dark winter, killing all but the lucky few.
However research published Monday based on particles found at a key fossil site reasserted an earlier hypothesis: that the impact winter was caused by dust kicked up by the asteroid.
Fine silicate dust from pulverized rock would have stayed in the atmosphere for 15 years, dropping global temperatures by up to 15 degrees Celsius, researchers said in a study in the journal Nature Geoscience."
Asteroid dust caused 15-year winter that killed dinosaurs: study
Here's the detailed study:
Chicxulub impact winter sustained by fine silicate dust
However research published Monday based on particles found at a key fossil site reasserted an earlier hypothesis: that the impact winter was caused by dust kicked up by the asteroid.
Fine silicate dust from pulverized rock would have stayed in the atmosphere for 15 years, dropping global temperatures by up to 15 degrees Celsius, researchers said in a study in the journal Nature Geoscience."
Asteroid dust caused 15-year winter that killed dinosaurs: study
Here's the detailed study:
Chicxulub impact winter sustained by fine silicate dust