geologists have divided Earth's history into time units which are largely based on
A.fossils
B.magnetism in rocks
C.evidence of erosion
D.climates
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Geologists have divided Earth’s history into time units based on fossil record.
The time units are eon, era, period and epoch.
The longest of them is eon characterized by abundance of fossils.
Eons are further subdivided into eras which are characterized by changes in the type of present fossils.
Period comes under era and is characterized by types and forms of life that existed around the world.
Epoch is characterized by change in life forms from one continent to another.
The time units are eon, era, period and epoch.
The longest of them is eon characterized by abundance of fossils.
Eons are further subdivided into eras which are characterized by changes in the type of present fossils.
Period comes under era and is characterized by types and forms of life that existed around the world.
Epoch is characterized by change in life forms from one continent to another.
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