Geologists
divide the history of the Earth into
twelve periods. Click here
to find an easy way to remember them all.
Each period is characterised by certain
flora and fauna, most of which are now
extinct, of course. The table below shows
you all the periods and how long ago they
were in MYA - millions of years ago.
When the
periods are arranged like this, they make up what is
called the "Geological Column". The further down the
table you go, the further back in time you get. The
exact dates of period intervals are often revised and
the values given should be taken as approximations.
Click on a
period to find out about it.
See also:
how the earth formed
See also: how to remember the
periods
See also:
evolution and the origin of human beings
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