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.

30 Mya to 25 Mya

30 Mya to 25 Mya

28.1 Mya, Paleogene, Oligocene Chatian: Ancestor of apes and humans. Grande Coupure extinctinction.  Start of widespread Antarctic glaciation. Rapid evolution and diversification of fauna, especially mammals.

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27,000,000 BP, USA: A volcanic eruption at what is now La Garita Caldera site of the San Juan volcanic field in Colorado. Approximate ejecta bulk volume: 5,000 km cubed.

~ USA: The Laramide Revolution shook the Earth. It raised the US state of New Mexico above sea level and began a period of Volcanism.

25,000,000 BP, USA: In the Laramide Revolution the land of what is now New Mexico was raised above sea-level and began a period of volcanism