What are the four eras of the geologic time scale
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List the four eras on the geologic time scale describe one identifying type of organism from each era
Answered by admin @
The four main time scales, starting from the earliest, are:
Precambrian- This era consisted of single-celled organisms and multicellular organisms also began to arise in this time period.
Paleozoic- The early part of this era primarily had fish and the latter part of the era consisted of amphibians and reptiles.
Mesozoic- The mesozoic era had dinosaurs, birds and some flowering plants
Cenozoic- Many dinosaur species had gone extinct and this era contains mammals.
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