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3 - 2.4
2.4 - 1.8
500 Fut 1.8 - 1.2 BC AD
1.2 - 600 Million
600 - 0
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3B
3 - 0 B
600M
20°
1010
98
.03
1.2
.45
.01
11°
1038
98
.2
1.24
.42
13°
1105
98
0
 
.4
16°
1132
98
0
1.3
.38
15°
1200
98
.2
1.34
.37
15°
1227
97
.27
1.37
.35
-50°
1254
96
2.1
1.4
.1
-22°
1321
96
1.85
1.42
.1
-21°
1349
97
1.27
1.42
.1
50°
1416
77
1.05
1.44
20
14°
1443
97
.94
1.44
.32
13°
1511
97
.94
1.43
.31
13°
1540
97
1.15
1.42
.31
13°
1608
98
.84
1.4
.3
13°
1636
98
.63
1.34
.3
12°
1704
98
.71
1.28
.3
12°
1732
98
.99
1.23
.3
12°
1800
98
.91
1.18
.3
12°
1827
98
.75
1.14
.3
12°
1855
98
.59
1.09
.3
12°
1923
98
.43
1.04
.3
12°
1951
98
.37
1
.3
12°
2019
99
.21
.96
.3
-16°
2047
99
.19
.93
.04
16°
2115
88
11
.85
.49
30°
2142
81
18
.74
.49
26°
2209
77
22
.66
.29
12°
2237
69
30
.63
.08
20°
2304
80
19
.62
.2
23°
2332
78
21
.74
.17
Solar System History
3000
4280
270
30
1
2900
4280
270
30
1
 2800
4280
270
30
1
2700
5640
.71
.89
1
2600
5640
.71
.89
1
2500
5640
.72
.89
1
2400
4280
270
30
1
 2300
4280
270
30
1
 2200
4280
270
30
1
2100
5640
.71
.89
1
2000
5640
.71
.89
1
1900
5640
.72
.89
1
1800
4280
270
30
1
1700
4280
270
30
1
 1600
4280
270
30
1
1500
5640
.71
.89
1
1400
5640
.71
.89
1
1300
5640
.72
.89
1
1200
5640
.72
.89
1
1100
5650
.73
.89
1
1000
5650
.73
.89
1
900
5640
.72
.90
1
800
5660
.74
.90
1
700
5740
.93
.98
1
600
5740
.94
.99
1
500
5750
.95
.99
1
400
5750
.96
.99
1
300
5750
.97
.99
1
200
5750
.98
1
1
100
5760
.99
1
1
13th GY
3 - 2.75
12th GY
2.75 - 2.5
11th GY
2.5 - 2.25
10th GY
2.25 - 2
9th GY
2 - 1.75
8th GY
2 - 1.75
7th GY
1.75 - 1.5
6th GY
1.5 - 1.75
5th GY
1.25 - 1
4th GY
1 B - 750 M
3rd GY
750 - 500
2nd GY
500 - 250
1st GY
250 - Pr
 
      T  
Dinosaurs
233.3 - Pr
Mesoarchaean
 3.2 - 2.8 400M
Neoarchean
 2.8 - 2.5 .3
Archean Eon
4 - 2.5 1.5
Siderian
2.5-2.3 .2
Rhyacian
2.3-2.05 .25
Orosirian
2.05-1.8 2.05
 Statherian Period
 1.8 - 1.6 200M
Paleoproterozoic Era 2.5 - 1.6 1B
Calymmian
 1.6 - 1.4 200M
Ectasian
 1.4 - 1.2 200M
Stenian
1.2B - 1B
200
Mesoproterozoic Era 1.6 B - 1B
Tonian 
1B - 720
 280
Cryogenian 
720 - 635
 65
Ediacaran
 - 541 94
Neoproterozoic Era 1B - 541
Proterozoic Eon 2.5 - 541 M 2,047,000,000
Precambrian Eon 4.6 - 541 M 4.059
C O S D C P
Paleozoic
 541 - 248 293
T J C
Mesozoic
252-66 186
P N Q
Cenozoic
66-0
Phanerozoic Eon
541 - Present
3 - 2.4
2.4 - 1.8
500 Fut 1.8 - 1.2 BC AD
1.2 - 600 Million
600 - 0
Precambrian Eon 4.6 - 541 M 4.059
Archean Eon 4 - 2.5 1.5
Mesoarchaean
 3.2 - 2.8 400M
Neoarchean
 2.8 - 2.5 .3
Earth's permanent crust is formed. Vast amounts of metallic minerals are deposited. oceans & atmosphere result from volcanic outgassing.
earliest life forms evolve in seas. They are prokaryotes—single-celled organisms with no nucleus—cyanobacteria (blue-green algae). earliest bacteria obtain energy through chemosynthesis (ingestion of organic molecules).
Proterozoic Eon
2.5 - 541 M 2,047,000,000
Paleoproterozoic Era 2.5 - 1.6 1B
Siderian 2.5 - 2.3 .2
2.5 First organisms to utilize oxygen.

Precambrian Eon 4.6 - 541 M 4.059
Proterozoic Eon
2.5 - 541 M 2,047,000,000
Paleoproterozoic Era 2.5 - 1.6 1B
Siderian 2.5 - 2.3 .2
2.4 Oxygenation of Atmosphere
Rhyacian
2.3-2.05 .25
Orosirian
2.05-1.8 2.05
2 Complex cells appear: Eukaryotes, which contain various organelles. eukaryotic cell seems to have evolved from a symbiotic community of prokaryotic cells. origin of eukaryotic cell is a milestone in evolution of life. Their higher level of organizational complexity permits development of truly multicellular organisms.
 Statherian Period
 1.8 - 1.6 200M
 
Precambrian Eon 4.6 - 541 M 4.059
Proterozoic Eon
2.5 - 541 M 2,047,000,000
Paleoproterozoic Era 2.5 - 1.6 1B
 Statherian Period
 1.8 - 1.6 200M
Mesoproterozoic Era 1.6 B - 1B .6
Calymmian
 1.6 - 1.4 200M
Precambrian Eon 4.6 - 541 M 4.059
Proterozoic Eon
2.5 - 541 M 2,047,000,000
Mesoproterozoic Era 1.6 B - 1B .6
Supercontinent Rodinia forms approximately 1.1 billion years ago. Plate tectonics slows to approximately same rate as present. Large mountain chains form as continents collide. Quartz-rich sandstones, shales, & limestones are deposited over continents. Oxygen levels increase as life on Earth develops ability to obtain energy through photosynthesis. late Proterozoic is an "Ice House" world.
Eukaryotes (single-celled organisms with a nucleus) evolve. These are more advanced forms of algae & a wide variety of protozoa. Eukaryotes can reproduce sexually, which makes genetic diversity possible, as well as ability to adapt to & survive environmental changes. Multi-celled, soft-bodied marine organisms (metazoans) evolve.
1.2 Sexual reproduction evolves, leading to faster evolution.
Neoproterozoic Era 1B - 541
Tonian 
1B - 720
 280
900 - 543 Neoproterozoic

900 Choanoflagellates are considered ancestors of entire animal kingdom, & in particular may be direct ancestors of sponges.

850 Proterospongia (members of Choanoflagellata) are best living examples of what ancestor of all animals may have looked like.
650 - 543 Vendian Sub-period.
Cryogenian 
720 - 635
 65
Ediacaran
635 - 541 94
670 Simple Animals
Precambrian Eon 4.6 - 541 M 4.059
Proterozoic Eon
2.5 - 541 M 2,047,000,000
Neoproterozoic Era 1B - 541
Ediacaran
635 - 541 94
Phanerozoic Eon
541 - Present
Paleozoic Era (Ancient Life)
543 - 248 295
Cambrian Period 541 - 485.4 55.6
Terreneuvian 0 - 0 0
Cambrian Series 2 0 - 0 0
Miaolingian 0 - 0 0
Furongian 0 - 0 0
trilobites
Ordovician Period 485.4 - 443.8 41.6
Early Ordovician 0 - 0 0
Tremadocian Stage 0 - 0 0
Floian Stage 0 - 0 0
 Middle Ordovician 0 - 0 0
Dapingian Stage 0 - 0 0
Darriwilian  Stage 0 - 0 0
 Late Ordovician 0 - 0 0
Sandbian Stage 0 - 0 0
Katian Stage 0 - 0 0
Hirnantian Stage 0 - 0 0
  Silurian Period 443.8 - 419.2 24.6

Cayugan (Late Silurian – Ludlow)

Lockportian  (Middle Silurian: late Wenlock)

Tonawandan (Middle Silurian: early Wenlock)

Ontarian (Early Silurian: late Llandovery)

Alexandrian (Earliest Silurian: early Llandovery)

In Estonia the following suite of regional stages is used:[16]

Ohessaare stage (Late Silurian – early Přídolí)

Kaugatuma stage (Late Silurian – late Přídolí)

Kuressaare stage (Late Silurian – late Ludlow)

Paadla stage (Late Silurian – early Ludlow)

Rootsiküla stage (Middle Silurian: late Wenlock)

Jaagarahu stage (Middle Silurian: middle Wenlock)

Jaani stage (Middle Silurian: early Wenlock)

Adavere stage (Early Silurian: late Llandovery)

Raikküla stage (Early Silurian: middle Llandovery)

Juuru stage (Earliest Silurian: early Llandovery)

 Devonian 419.2 - 358.9 60.3
Lower Devonian 419.2 - 393.3 0
Lochkovian Stage 419.2 - 410.8 0
Pragian Stage 410.8 - 407.6 0
Emsian Stage 407.6 - 393.3 0
Middle Devonian 393.3 - 382.7 0
Eifelian Stage 393.3 - 387.7 0
Givetian  Stage 387.7 - 382.7 0
Upper Devonian 382.7 - 358.9 0
Frasnian Stage 382.7 - 372.2 0
Famennian Stage 372.2 - 358.9 0
Carboniferous 358.9 - 298.9 60
Mississippian Stage 382.7 - 372.2 0
Tournaisian Stage 419.2 - 410.8 0
Visean Stage 410.8 - 407.6 0
Serpukhovian Stage 407.6 - 393.3 0
Permian 298.9 - 251.9 47
Cisuralian Stage 298.9 - 272.95 0
Asselian Stage 298.9 - 295 0
Sakmarian Stage 295 - 290.1 0
Artinskian Stage 290.1 - 283.5 0
Kungurian Stage 283.5 - 272.95 0
Guadalupian Stage 272.95 - 259.1 0
Roadian Stage 272.95 - 268.8 0
Wordian Stage 268.8 - 265.1 0
 Capitanian 265.1 - 259.1 0
Lopingian Stage 259.1 - 251.902 0
Wuchiapingian Stage 259.1 - 254.14 0
Changhsingian 254.14 - 251.902 0
550 Arthropods (ancestors of insects, arachnids)
543 - Present Phanerozoic Era
530 - 527 Tommotian
500 Fish and Proto-amphibians
450 Land PlantsOrdovician–Silurian extinction events
400 Insects and Seeds
360 AmphibiansLate Devonian extinction
300 Reptiles
251.902 - 66 Mesozoic Era (Middle Life)
250 Million to present 1st Galactic year
Carboniferous Period 354 - 290
Geologic - Sedimentary rocks (sandstone, shale, limestone, conglomerate) form in shallow seas over continents. Rodinia begins to break up into northern & southern portions. Gondwana in south incorporates South America, Africa, Antarctica, & Western Australia as well as peninsular India & parts of Arabia.
global climate is generally mild.
Biologic - The first fish, corals, and shellfish appeared.
Marine metazoans with mineralized skeletons, such as sponges, bryozoans, corals, brachiopods, molluscs, arthropods, and echinoderms, flourish. One group of arthropods, trilobites, are particularly dominant in shallow-water marine habitats.
Plant life is limited to marine algae.
250 Permian–Triassic extinction event; 57% of all biological families and 83% of all genera die
230 Dinosaurs
200 MammalsTriassic–Jurassic extinction event
65 - Present Cenozoic Era
600 It is thought that earliest multicellular life on Earth was a sponge-like creature.
Sponges are among simplest of animals, with partially differentiated tissues but without muscles, nerves, or internal organs. Porifera are phylogenetically oldest animal phylum extant today. In some ways they are closer to being cell colonies than multicellular organisms.
3 - 2.4
2.4 - 1.8
500 Fut 1.8 - 1.2 BC AD
1.2 - 600 Million
600 - 0