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The history of Earth Timeline
Some Important events in earths History
28
Science
11th Grade
09/24/2013
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Term
4.56 Billion Years ago
 Definition
Earth Forms
Term
4.4 Billion Years ago
 Definition
Oldest mineral grain found
Term
4.1 Billion Years ago
 Definition
Oldest peice of rock ever found
Term
3.9 Billion Years ago
 Definition
Oldest evidence of continent
Term
3.8 Billion Years ago
 Definition
First Evidence of life
Term
3.5 Billion Years ago
 Definition
First Fossils(Algae & Bacteria)
Term
1.8 Bilion Years ago
 Definition
Free O2 in the atmosphere
Term
1.1 Billion Years ago
 Definition
First fossil of a complex organism(Worm)
Term
540 Million Years ago
 Definition
First abundant life found in the rock record
Term
460 Million Years ago
 Definition
First Fish
Term
440 Million Years ago
 Definition
First land plants
Term
410 Millions Years ago
 Definition
First land animals
Term
250 Million Years ago
 Definition
Largest mass extinction
Term
247 Million Years ago
 Definition
First Dinosaurs
Term
240 Million Years ago
 Definition
First Mammals
Term
220 Million Years ago
 Definition
Break-up of the super continent pangaea
Term
145 Million Years ago
 Definition
First flowering plants
Term
65 Million Years ago
 Definition
Dinosaurs and other animals go extinct
Term
30 Million Years ago
 Definition
Mammals/flowering plants become abundant
Term
5 Million Years ago
 Definition
Begining of Cascade
Term
1.8 Million Years ago
 Definition
First primate in genus homo
Term
40,000 Thousand Years ago
 Definition
First Homosapiens
Term
13,000 Thousand Years ago
 Definition
Humans first inhabit North America
Term
10,000 Thousand Years ago
 Definition
End of the last ice age
Term
8,000 Thousand Years ago
 Definition
Founding of jericho, The first known city
Term
2,000 Years Ago
 Definition
Roman domination of the world
Term
500 Years ago
 Definition
European rediscovery of the Americas
Term
~34 Years ago
 Definition
Humans first explore the moon
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