A Million-Year-Long Volcanic Eruption Depleted The Ozone Layer, Before The Dinosaurs


Dubbed as the “Great Dying,” a million-year-long volcanic eruption caused a massive extinction 250 million years ago, in the Permian-Triassic, way before the dinosaurs. Also known as the Permian-Triassic Extinction Event, the eruption depleted the ozone layer considerably and killed the life on Earth almost entirely.

The scientists believe that this one million-year-long volcanic eruption, sometimes referred to as the “Siberian Flood Basalts,” caused the extinction of about 96 percent of the marine life and 70 percent or the terrestrial animals. Now, a recent study concludes that the “Great Dyings” event also caused the ozone layer to deplete.

“The scale of this extinction was so incredible that scientists have often wondered what made the Siberian Flood Basalts so much more deadly than other similar eruptions,” said Michael Broadley, the study’s leading author. “We concluded that the large reservoir of halogens that was stored in the Siberian lithosphere was sent into the earth’s atmosphere during the volcanic explosion, effectively destroying the ozone layer at the time and contributing to the mass extinction,” the researcher added.

The one million-year-long volcanic eruption extinction event killed the life on Earth and depleted the ozone layer 250 million years ago

Before dinosaurs ruled the Earth, many other marine creatures and land animals live on our planet 250 million years ago in the Permian-Triassic period. However, these creatures faced the most significant extinction event known to us so far, the so-called “Great Dying” or “Siberian Flood Basalts.”

This event, triggered by a million-year-long volcanic eruption, killed the marine life almost entirely, while only 70% of the terrestrial creatures died. Besides, the volcanic eruption caused the ozone layer to deplete, permitting the solar radiations to reach the surface of the Earth causing more damage.

This one-million-year-long volcanic eruption emitted chlorine, bromine, and iodine into the Earth’s atmosphere, practically destroying the ozone layer and killing almost all the living creatures on the planet, to such an extent that it took about 10 million years for life on Earth to recover.


Recommended For You

Leave a Reply

Your email address will not be published. Required fields are marked *