Timeline: Geologic Eras

ERA PERIOD EPOCH

CENOZOIC (65.5 million years ago to present)

Neogene (23 million years ago to the present) Holocene (11,500 years ago to present)
    Pleistocene (1.8 million years ago to 11,500 years ago)
    Pliocene (5.3-1.8 million years ago)
    Miocene (23-5.3 million years ago)
  Paleogene (65.5-23 million years ago) Oligocene (33.9-23 million years ago)
    Eocene (55.8-33.9 million years ago)
    Paleocene (65.5-55.8 million years ago)
MESOZOIC (251-65.5 million years ago) Cretaceous (145.5-65.5 million years ago)  
  Jurassic (200-145.5 million years ago)  
  Triassic (251-200 million years ago)  
PALEOZOIC (542-251 million years ago) Permian (299-251 milion years ago)  
  Pennsylvanian (318-299 million years ago)  
  Mississippian (359-318 million years ago)  
  Devonian (416-359 million years ago)  
  Silurian (444-416 million years ago)  
  Ordovician (488-444 million years ago)  
  Cambrian (542-488 million years ago)  
PRECAMBRIAN (undefined to 542 million years ago) Proterozoic (2,500-542 million years ago)  
  Archean (undefined to 2,500 million years ago)  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Source: Pamela J. W. Gore, Georgia State University Perimeter College

 
From Our Home Page
Civil War: Atlanta Home Front

At the time of the Civil War (1861-65),

Read more...
Judith Priddy-Orr (1937-2011)

Judith

Read more...
Jenkins County

Jenkins County, located in the southeastern part of the state, is Georgia's 140th county and has an area of 350

Read more...
David Bushnell (1740-1826)

David Bushnell is credited as the inventor of the submarine, which was first used to launch explosives against British ships during the

Read more...
Courtesy of Hargrett Rare Book and Manuscript Library, University of Georgia Libraries