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6 - 5.4
5.4 - 4.8
500 Fut 4.8 - 4.2 BC AD
4.2 - 3.6
3.6 - 3
Views PHP Hits Count
 
3B
6 - 3 B
600M
   
     
1,000°
410
7
0
0
50
84
3
7
2.3
350°
432
16
0
0
68
.65
2.6
5
2
230°
453
0
0
0
70
.51
2
.4
160°
515
35
0
0
61
.38
1.7
99°
538
62
0
0
36
.31
1.3
69°
601
92
0
.01
7
.25
1
49°
624
97
0
.08
1.8
.19
.76
39°
648
98
0
.34
1.3
.15
.59
34°
712
98
0
.7
1.1
.11
.46
32°
737
98
0
.83
.95
.1
.35
30°
802
98
0
1.01
.79
.07
.24
28°
828
98
0
1.06
.67
.06
.17
26°
853
98
0
1.1
.57
.04
.1
24°
919
98
0
1.14
.52
.03
.04
22°
944
98
0
1.17
.48
.02
.02
Solar System History
   
     4600
4280
270
30
1
4500
5640
.71
.89
1
4400
5640
.71
.89
1
4300
5640
.72
.89
1
4200
5640
.72
.89
1
4100
5650
.73
.89
1
4000
5650
.73
.89
1
3900
5640
.72
.90
1
3800
5660
.74
.90
1
3700
5660
.75
.90
1
3600
5660
.76
.91
1
3500
5670
.76
.91
1
3400
5670
.77
.91
1
3300
5670
.77
.91
1
3200
5670
.78
.92
1
3100
5680
.78
.92
1
25th
6 - 5.75
24th
5.75 - 5.5
23th
5.5 - 5.25
22th
5.25 - 5
21th
5 - 4.75
20th
4.75 - 4.5
19th
4.5 - 4.25
18th
4.25 - 4
17th
4 - 3.75
16th
3.75 - 3.5
15th
3.5 - 3.25
14th
3.25 - 3
 
Pre-Nectarian
4.533-3.92 6.13
Nectarian 
3.92-3.85 .07
Hadean Eon 4.6 - 4 .2
Eoarchean
4 - 3.6 .4
Palaeoarchaean
3.6-3.2 .4
Mesoarchaean
3.2 - 2.8 400M
Archean Eon 4 - 2.5 1.5
Precambrian Eon 4.6 - 541 M 4.059
6 - 5.4
5.4 - 4.8
500 Fut 4.8 - 4.2 BC AD
4.2 - 3.6
3.6 - 3
   
Precambrian Eon 4.6 - 541 M 4.059
4.6 Earth formed
Hadean Eon 4.6 - 4 .2
Pre-Nectarian Period
4.533 - 3.92  6.13
4.6 - 4.4 cool early Earth theory  modest influx of bolides and a cool climate, allowing the presence of liquid water.
4.57 formation of the Solar System
4.5 Earth accreted (gradually grew by accumulation of) icy planetesimals  when it was 60 to 90% of its current size
4.5 - 0 4.5 billion-year-old meteorites found on Earth that contained liquid water alongside a wide diversity of deuterium-poor organic compounds 
4.404 ± 0.008 1st water and atmosphere
4.4 Oldest rocks known on Earth
4.28 - 3.7 580 Earth's crust formed
Precambrian Eon 4.6 - 541 M 4.059
Hadean Eon 4.6 - 4 .2
Pre-Nectarian Period
4.533 - 3.92  6.136
4.1 - 3.8 Late Heavy Bombardment  lunar cataclysm disproportionately large number of asteroids are theorized to have collided with the early terrestrial planets in the inner Solar System, including MercuryVenusEarth, and Mars.
4 Earliest Life
Nectarian Luna Period
3.92 - 3.85 .07
3.9 cataclysmic cratering event near 3.9
  • 22,000 or more impact craters with diameters >20 km (12 mi),
  • about 40 impact basins with diameters about 1,000 km (620 mi),
  • several impact basins with diameters about 5,000 km (3,100 mi),
3.9 - 2.5 metior cluster
Archean Eon 4 - 2.5 1.5
Eoarchean Era
4 - 3.6 .4
4.1 Earliest biotic life appears, possibly derived from self-reproducing RNA molecules. copying/reproducing/replicating of these molecules requires resources like energy, space & smaller building blocks, which soon become limited, resulting in competition. Natural selection favors those molecules which are more efficient at replication. DNA molecules then took over as main replicators. They soon develop inside an enclosing membrane which provide a stable physical & chemical environment conducive to their replication - birth of proto-cells.

Geologic - The Earth forms as a solid planet.

3.85–2.45 Stage 1  Practically no O2 in the atmosphere. 
3.8 1st Life. Cells resembling Prokaryotes appear. Chemoautotrophs using carbon dioxide as a carbon source & oxidize inorganic materials to extract energy. Later, prokaryotes evolve glycolysis, a set of chemical reactions that free energy of organic molecules such as glucose. Glycolysis generates ATP molecules as short-term energy currency, & ATP continue to be used in almost all organisms unchanged to this day.
Precambrian Eon 4.6 - 541 M 4.059
Archean Eon 4 - 2.5 1.5
Palaeoarchaean Era
3.6 - 3.2 .4
3.5 Oxygen
3.5 - 0 prokaryote unicellular organism that lacks a membrane-bound nucleusmitochondria, or any other membrane-bound organelle.
3.4 Photosynthesis
Mesoarchaean Era 3.2 - 2.8 400M
6 - 5.4
5.4 - 4.8
500 Fut 4.8 - 4.2 BC AD
4.2 - 3.6
3.6 - 3