"Nearly 100 million years ago, the Earth experienced an extreme environmental disruption that choked oxygen from the oceans and led to elevated #marine #extinction levels that affected the entire globe.

Now, in a pair of complementary new studies, two Northwestern University-led teams of geoscientists report new findings on the chronology and character of events that led to this occurrence, known as #Ocean Anoxic Event 2 (OAE2),..cont."

#Anoxic Event
#AnoxicEvent
#OAE2

https://phys.org/news/2023-01-malformed-seashells-ancient-sediment-clues.html