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 Perimeter College

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

From Our Home Page
Harriet Powers (1837-1910)

Harriet Powers is one of the best-known southern African American quilt makers, even though only two of her quilts, both of which she made after t

Read more...
Eugene Bullard (1895-1961)

Eugene Bullard was the world's first black combat aviator, flying in French squadrons during World War I (1917-18).

Read more...
Annie L. McPheeters (1908-1994)

Annie L. McPheeters was one of the first African American professional librarians in the Atlanta Public Library and an influential proponent of African American culture and history.

Read more...
Black Leaders of the Civil Rights Movement
Georgia has been home to a number of major figures who participated throughout the twentieth century in the struggle for civil rights. ...

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