Does timing agree with any major extinction event? Anyone?
This was all before the rise of life on earth. Maybe it was a trigger event.
If there was life before 3.9 billion years, there is no remaining evidence of it. I believe life as we know it didn't appear for another 400 million years or so, far as we can tell. Life forms were very simple for a very long time, single cellular guys for over 2 billion years. The interesting multicellular stuff didn't start until about 500 million years ago. There were occasional mass extinctions during those last 500 million years.
At that time there wasn't enough on the Earth to drive extinct!
It's too long ago.