What major global event immediately preceded the time period when *Gastornis* flourished?
Answer
The Cretaceous-Paleogene extinction event.
The time frame when *Gastornis* fossils appear immediately followed the Cretaceous-Paleogene extinction event, the one that wiped out the non-avian dinosaurs, allowing large avian forms to fill vacant ecological niches.
Related Questions
What was the previous scientific name for *Gastornis* recognized before the current consensus?During which geological epochs did *Gastornis* dominate terrestrial environments?What is the modern favored hypothesis regarding the primary diet of *Gastornis*?How did the estimated mass of *Gastornis* compare to the modern ostrich?What structural feature of *Gastornis* is the primary clue used to infer its feeding habits?What ecological role did the success of *Gastornis* imply about the Paleocene ecosystem?To which modern avian group does current thinking suggest *Gastornis* might have a closer skeletal affinity?What major global event immediately preceded the time period when *Gastornis* flourished?What anatomical feature led paleontologists to initially popularize the idea that *Gastornis* was a formidable predator?What evolutionary risk is demonstrated by the specialized nature of *Gastornis*'s highly specific diet?