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EARTH SCIENCE

Platte Canyon High School
Bailey, Colorado

Useful Info

USEFUL INFORMATION
Geologic Time Scale

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  Era Period Sub-Period Epoch Time (began)
Phanerozoic Cenozoic Quaternary Pleistogene Holocene  
Pleistocene  
Tertiary Neogene Pliocene  
Miocene  
Paleogene Oligocene  
Eocene  
Paleocene 65 million years ago
Mesozoic Cretaceous      
Jurassic      
Triassic     248 million years ago
Paleozoic Permian      
Carboniferous Pennsylvanian    
Mississippian    
Devonian      
Silurian      
Ordovician      
Cambrian     590 million years ago
Pre-Cambrian Proterozoic        
Archean       4500 million years ago

Interesting and sometimes Bizarre Links:

http://www.ucmp.berkeley.edu/help/timeform.html    Very good timescale with descriptions

http://www.enchantedlearning.com/subjects/Geologictime.html    Cutesy timescale

http://oldsci.eiu.edu/geology/jorstad/geoltime.html    Mnemonic devices for learning the time scale

http://www.geobop.com/paleozoo/Time/    Colorful display

http://www.vendian.org/mncharity/dir3/geologic_time_galactic/    timescale based on galactic orbits (250 my = 1 galactic orbit)

http://www.aqd.nps.gov/grd/usgsnps/gtime/gtime2.html    Scaled time scales

http://pseudonumerology.com/6.htm    Memorizing the numbers of the Geologic Time Scale - a little involved

http://www.sdnhm.org/fieldguide/fossils/timeline.html    Textual description of life and geologic development for the periods.

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