See also: C-T Extinction
The Cretaceous-Tertiary Transition, or the Cretaceous-Paleogene Boundary, is a mass extinction event that happened around 66.038 mya. It caused many fatalities to every single group but fish and amphibia. The pulpy animals and reptilians received the most damage. Mammals survived but 60% died out, including Nemegtebaar and Alphadon. There are many theories.
Extinctions[]
Main article: Category:Cretaceous extinctions
EXTINCT GROUPS[]
- Ornithischia, Sauropodomorpha
- Thecodontosauria
- Pterosauria
- Plesiosauria, Pliosauria and Mosasauria
all Ammonites dissapeared.
Possible Explaination[]
66.038 mya, volcano activity started in India, an island at the time. It's chunks wiped out the Majungasaurus and the Rapetosaurus on Madagascar, and later, 65.95 mya, Masiakasaurus Knopfleri. The remaining Archosaurs (barring birds, caymanians and alligators) were then wiped out by climate change. Toxic flowers ruined the Hadrosaurs, mammals ate the eggs and spreaded a lethal malady. New land got created, making the summers and winters become heater and colder, respectively. This all was enough to destroy 75% of all live on earth. The Epoch of the Reptilians (330-64,2 mya) was over. The most accepted and famous theory is a particularly large asteroid or comet hitting the Earth, there is plenty of evidence supporting this theory, such as a massive 100 mile wide crater in the Yucatan Peninsula, dating back to 66 million years ago, or the time of the extinction. The asteroid needed to cause the extent of the extinction would be at the very least 5 miles.