Precambrian Era

1
Precambrian Era

• By Erich Hartman

2
When It Occurred

• The Precambrian Era occurred from 4.6 billion
  years ago to 544 million years ago.
• It was the first of four eras on the geological
  time scale.

3
The Precambrian Supereon

• The Precambrian Supereon Is divided into three
  Precambrian eons, the Proterozoic, the Archaean,
  and Hadean.

4
Proterozoic Eon

• This eon refers to the time from the lower
  Cambrian boundary, 542 Ma (million), back through
  2500 Ma.
• The Proterozoic Eon is divided into three eras,
  the Neoproterozoic, Mesoproteozoic, and
  Paleoproterozoic.

5
Neoproterozoic Era

• This era is the upper geological era of the
  Proterozoic eon, from the Cambrian period lower
  boundary (542 Ma) back to 1000 Ma.
• The Neoproterozoic era corresponds to Precambrian
  Z rocks of older North American geology.

6
Edicaranian Period

• The Edicaranian period is the upper geological
  period of the Neoproterozoic era.
• During this period the Edicaranian fauna
  appeared.
• It happened from 630 Ma to 542 Ma.

7
Cryogenian Period

• The Cryogenian period is the middle period in the
  Neoproterozoic era.
• It dated from 950 Ma to 630 Ma.

8
Tonian Period

• The Tonian period is the earliest period in the
  Neoproterozoic era.
• It dated from 1000 Ma to 950 Ma.

9
Mesoproterozoic Era

• The Mesoproterozoic Era is the middle era of the
  Proterozoic Eon.
• It dated from 1000 Ma to 1600 Ma.
• It corresponds to Precambrian Y rocks of older
  North American geology.

10
Paleoproterozoic Period

• The Paleoproterozoic period is the oldest period
  in the Neoproterozoic era.
• It dates from 1600 Ma to 2500 Ma.
• It corresponds to Precambrian X rocks of older
  North American geology.

11
Archaean Eon

• Dated from 2500 Ma to 3800 Ma.

12
Hadean Eon

• This term was intended originally to cover the
  time before any preserved rocks were observed.
• Some zircon crystal from 4400 Ma demonstrated the
  existence of crust in the Hadean eon.
• Other records from Hadean time come from the moon
  and meteorites.

13
My One Source

• www.wikipedia.com