Studies reveal causes of a lesser-known mass extinction about 260 million years ago

Ocean stagnation, ecosystem collapses, and volcano eruptions all played a role.

https://arstechnica.com/science/2023/07/studies-reveal-causes-of-a-lesser-known-mass-extinction-about-260-million-years-ago/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social

Mass extinction event 260 million years ago resulted from climate change, studies say

Ocean stagnation, ecosystem collapses, and volcano eruptions all played a role.

Ars Technica