MAJOR GEOLOGICAL AND BIOLOGICAL EVENTS IN THE PERIODS OF EARTH'S HISTORY

 

THE PRECAMBRIAN

 

 

EARLY PALEOZOIC

 

MID-PALEOZOIC

 

 

LATE PALEOZOIC

 

EARLY-MID MESOZOIC

 

 

LATE MESOZOIC

 

EARLY CENOZOIC

 

LATE CENOZOIC