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EARTH SCIENCE

Platte Canyon High School
Bailey, Colorado

Time Scale

GEOLOGIC TIME SCALE

Devonian

after Harland et al., 1982

  =========================================================
Period Epoch Age Ma age Comments
      360  
Devonian D3 Famennian 367  
Frasnian 374  
D2 Givetian 380  
Eifelian 387  
D1 Emsian 394  
Siegenian 401  
Gedinnian 408