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The History of the Earth Timeline
Some important events in the Earth's History
28
Science
11th Grade
09/24/2013
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Term
Earth Forms
 Definition
4.56 Billion years ago (BP)
Term
Oldest piece of rock ever found
 Definition
4.1 Billion years old (BP)
Term
Oldest evidence of a continent
 Definition
3.9 Billion years (BP)
Term
First evidence of life
 Definition
3.8 Billion years (BP)
Term
First fossils (alage and bacteria)
 Definition
3.5 Billion years (BP)
Term
Free O2 in atmosphere
 Definition
1.8 Billion years (BP)
Term
First abundant life found in the rock record
 Definition
540 Million years (BP)
Term
First fish
 Definition
460 Million years (BP)
Term
First land plants
 Definition
440 Million years (BP)
Term
First land animals
 Definition
410 Million years (BP)
Term
Largest mass extinction
 Definition
250 Million years (BP)
Term
First dinosuars
 Definition
247 Million years (BP)
Term
First mammals
 Definition
240 Million years (BP)
Term
Break-up of super continent Pangaea begins
 Definition
220 Million years (BP)
Term
First flowering plants
 Definition
145 Million years (BP)
Term
Dinosuars and other animals go extinct
 Definition
65 Million years (BP)
Term
Mammals/flowering-plants become abundant
 Definition
30 Million years (BP)
Term
Beginning of Cascade
 Definition
5 Million years (BP)
Term
First primate in genus Homo
 Definition
1.8 Million years (BP)
Term
First homosapiens
 Definition
40,000 years (BP)
Term
Humans first inhabit North America
 Definition
13,000 years (BP)
Term
End of last Ice Age
 Definition
10,000 years (BP)
Term
Founding of Jericho (first known city)
 Definition
8,000 years (BP)
Term
Roman domination of the world
 Definition
2,000 years (BP)
Term
European rediscovery of the Americas
 Definition
500 years (BP)
Term
Humans first explore the moon
 Definition
~34 years (BP)
Term
First fossil of complex organism (worm)
 Definition
1.1 Billion years (BP)
Term
Oldest mineral grain ever found
 Definition
4.4 Billion years (BP)
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