100,000,000 BP to 50,000,000 BP  

 

 

 67,000,000 BP: An extraterrestrial object struck the Earth and marked the end of the the Cretaceous period and the beginning of the Tertiary period.

c.65,000,000 BP: It is said that a comet did enormous damage to our Earth. About this time an extraterrestrial object struck Earth and marked the end of the Cretaceous period and  the beginning of the Tertiary Period.

 

 

 5.33 Mya: The Zanclean flood may have been about this time.

 

50,000,000 BP: Evidence of cave art.   

~ Canada: About this time there was a massive explosive volcanic eruption near what is now Bennett Lake, Brittsh Columbia, Yukon Canada.