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Travis and Johnny's Geologic Timeline
Project Name : Travis and Johnny's Geologic Timeline
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Travis and Johnny's Geologic Timeline
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Life History Event Timeline

Great Wall of China Geologic Time Analogy:
If all of geologic time (4,700 million years) were the length of the Great Wall of China (5,500 miles), then the following event would occur...

 Event #  Your Analogy Value Years Ago 
1  At the beginning of the wall 0 miles away. 0
Now

 
 Event #  Your Analogy Value Years Ago 
 2   .19 miles away. 160,000
The first homo sapiens appear. 

            
 Event #  Your Analogy Value Years Ago 
 3 53 miles away. 
 45 million
Modern mammals appear on Earth. Flowering plants become widespread and global cooling creates Antarctic ice sheets.  

 Event #  Your Analogy Value Years Ago 
 4   76 miles away. 
 65 million
Volcanic eruptions produce great volume of lava and gases. Dinosaurs soon become extinct on Earth. 

 Event #  Your Analogy Value Years Ago 
 5 176 miles away. 
 150 million
 First birds that could fly appear on Earth. 

 Event #  Your Analogy Value Years Ago 
6  322 miles away. 275 million
 The formation of the supercontinent Pangea.

 Event #  Your Analogy Value Years Ago 
7  363 miles away.  310 million
 The first reptiles and winged insects appear on land. Forests with ferns, mosses, and large trees develop.  

 Event #  Your Analogy Value Years Ago 
8 439 miles away.  375 million
First vertebrates with legs and amphibians found on land. 

 Event #  Your Analogy Value Years Ago 
9  491 miles away.  420 million
Stabilization of Earth's climate. The first fish with jaws, such as sharks in water. The first insects, such as spider and centipedes, appear on land.   
 

  
 Event #  Your Analogy Value Years Ago 
10 518 miles away.  443 million
 The second mass extinction occurs- the Glaciation of Gondwana. It kills many marine invertebrates.  
 
 Event #  Your Analogy Value Years Ago 
11  556 miles away.  475 million
First vertebrates appear in the ocean. The first fungi and green plants grow on land. 
 
 Event #  Your Analogy Value Years Ago 
12 620 miles away. 530 million
Animals with shells appear on Earth. 
 
 Event #  Your Analogy Value Years Ago 
13  679 miles away.  580 million
  The first soft-bodied organisms such as jellyfish develop. 
 
 Event #  Your Analogy Value Years Ago 
14  761 miles away.  650 million
 The mass extinction of sea plants occurs. This is due to the global glaciation or "Snowball Earth." 

 Event #  Your Analogy Value Years Ago 
15  878 miles away.  750 million
 The breakup of Rodinia and formation of the new supercontinent Pannotia occurs.  
 
 Event #  Your Analogy Value Years Ago 
16  1,170 miles away.  1,000 million
 Multicellular organisms appear on Earth. 

 Event #  Your Analogy Value Years Ago 
17  1,287 miles away.   1,100 million
 The formation of the supercontinent Rodinia occurs. 
 
 Event #  Your Analogy Value Years Ago 
18 1,521 miles away.  1,300 million
 Green and red algae, such as chlorobionta and rhodophyta, appear. 
 
 Event #  Your Analogy Value Years Ago 
19 1,755 miles away.  1,500 million
The first Eukaryotic cells appear on Earth. 
 
 Event #  Your Analogy Value Years Ago 
20  1,872 miles away. 1,600 million
The formation of the ozone layer occurs, which starts blocking ultraviolet radiation from the sun.  
 
 Event #  Your Analogy Value Years Ago 
21 2,106 miles away.   1,800 million
Complex single-celled life appear,  such as bacteria and archaeans. 
 Event #  Your Analogy Value Years Ago 
22  2,340 miles away.  
 2,000 million
 Oxygen starts accumulating in the atmosphere. 
 
 Event #  Your Analogy Value Years Ago 
23  2,574 miles away.
 2,200 million
Organisms with mitochondria capable of aerobic respiration first appear.  
 
 Event #  Your Analogy Value Years Ago 
24 2,926 miles away. 2,500 million
First free oxygen is found in the oceans and atmosphere. 

 Event #  Your Analogy Value Years Ago 
25  3,511 miles away.
 3,000 million
The atmoshpere is 75% nitrogen and 15% carbon dioxide.  

 Event #  Your Analogy Value Years Ago 
26 4,096 miles away.
 3,500 million
First known life begins with monocellular prokaryotes.  
      
 Event #  Your Analogy Value Years Ago 
27  4,447 miles away. 3,800 million
      The surface of Earth changes from molten to solid rock.      
 
 Event #  Your Analogy Value Years Ago 
28  4,681 miles away.
 4,000 million 
Earth's atmosphere becomes mostly carbon dioxide, water vapor, methane, and ammonia.  
 
 Event #  Your Analogy Value Years Ago 
29  5,266 miles away. 4,500 million
The moon forms from fragments of a collision between Earth the planetoid Theia.  
 
 Event #  Your Analogy Value Years Ago 
30  At the end of the wall 5,500 miles away. 
 4,700 million
The Milky Way is formed from a giant rotating cloud of gas and dust, known as a protoplanetary disc. The sun formed at the center of the disc, and the planets gradually formed around the sun.        
 
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