4.5 billion years agocomets are forming earth
earth is molten, about 8000 degrees
4.4 billion years agoearth started to cool and solidify.
water began to form
4 billion years agoearth is covered in water vapor. 90 percent water. small volcanic islands. the oceans were green do to a surplus of iron. the atmosphere was thick with carbon dioxide, making the air thick and red.
3.4 billion years agooceans dominated, granite appears from basil and saltwater, continents begin to form.
2.5 billion years agogranite planet-stromatolite continents are everywhere
1.5 billion years agoblue planet
oxygen is in the water which oxidized out the iron
continents are moving
1 billion years agorodinia is formed over the south pole blocking the currents
Cambrian (Paleozoic Era)Ice starts to melt, rodinia breaks apart, ozone begins to form causing the start of marine life.
Ordovician (485 MYA)marine life continues to grow
Silurian (443 MYA)Continental landmasses were low and sea levels were rising
Devonian (419 MYA)Ozone becomes fully formed
Carboniferous (358 MYA)Consists of many swampy forests of which produced coal.
Permian (298 MYA)Animals are able to come onto land. pangaea is forming, land consists of many tropical swamps
Triassic (251 MYA)volcanic eruptions happen at a global level, 95% of species have gone extinct, pangaea is formed, oxygen levels increase, and dinosaurs evolve.
Jurassic (201 MYA)volcanic activity breaks up pangaea, high carbon dioxide levels warm up the planet, tropical forests become dominant, oxygen levels high.
Cretaceous (145 MYA ended with a mass extinction 65 MYA)pangaea splits apart, dinosaurs rule the earth
65 mya- meteor impacts earth, making the dinosaurs go extinct.
Tertiary (65 MYA)mammals dominate, the swiss alps and himalayas form from colliding continents.
Quaternary (2.6 MYA)grand canyon is formed
ice ages begin forming because land badge blicks warm water currents