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Geological eons, eras and periods

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Quiz by profnick
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Last updated: October 2, 2019
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First submittedOctober 1, 2019
Times taken95
Average score63.6%
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Eons
Name
Etymology (Greek)
4.6-4.0 billion years ago
Hadean
Underworld
4.0-2.5 bya
Archean
Origin
2.5 bya-541 million years ago
Proterozoic
Early life
541 mya to present
Phanerozoic
Visible life
Eras of current eon
 
 
541-252 mya
Paleozoic
Old life
252-66 mya
Mesozoic
Middle life
66 mya to present
Cenozoic
New life
Periods of current eon
 
 
Everything before current eon
Precambrian
 
541-485 mya
Cambrian
Wales (Latin)
485-443 mya
Ordovician
A Celtic tribe from Wales
443-419 mya
Silurian
A Celtic tribe from Wales
419-359 mya
Devonian
Devon, England
359-299 mya
Carboniferous
Coal-bearing (Latin)
299-252 mya
Permian
Perm, Russia
252-201 mya
Triassic
Three
201-145 mya
Jurassic
Jura Mountains in the Alps
145-66 mya
Cretaceous
Chalk (Latin)
66-23 mya
Paleogene
Old born
23-2.58 mya
Neogene
New born
2.58 mya to present
Quaternary
Four (Latin)
Epochs of current period
 
 
2.58 mya-11.7 thousand years ago
Pleistocene
Most new
11.7 thousand years ago to present
Holocene
Entirely new
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