EARTH SCIENCE |
Platte Canyon High
School |
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USEFUL
INFORMATION |
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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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