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Precambrian Time 4600 MYA
The earth formed from plantery nubula. Oldest age-dated rock on earth. Fossil algea and stromatolites (prokaryotes). Fossil evidence of bacteria. Fossil evidence of cells with a nucleus (eukaryotes). First multi-celled organisms (seaweed and algae). Oldest marine worms and jellyfish. -
Period: to
geologic time scale in one calender year
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Origin of life (first cells) 3900 MYA
3900 million years ago -
Prokaryotes 3600 MYA
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eukaryotes 2100 MYA
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Paloezoic era 544 MYA
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cambrian period 544 MYA
burgess shale animals with a notochord -
ordvovivcian period 544 MYA
first fish first fossil evidence of land plants -
Silurian period 438 MYA
First vascular land plants,oldest lung fish fossils -
Deconian period 408 MYA
oldest fossil evidence of mosses ,first insects ,first lobe finned fish land animals,sharks ,and seed plants. -
Mississippian period 360 MYA
first possible reptiles -
Pennsylavanian period
permian system begins , snailback reptiles . end of paleozioc. 96% of all life on earth perishes -
Mesozoic era "the age of repiles" 245 MYA
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triassic period 245 MYA first crocodiles and dinosaurs and mammals ,also turtles
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jurassic period 208 MYA
dilophosauras early dinos first birds apatosauaus and brachiosauras stegosaurus -
Cretaceous period 144 MYA
first flowering plants duck billed dinos prooceratops t-rex velocerrapter end of mesozioc era metor or comet impact -
cenozoic era - The age of animals - 65 MYA
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teritary period 65 MYA
first ancestors of dogs and cats ,grass is wide spread pigs deer ancestors horses and rabbits first monkeys human like ancestors. -
Quaternary period 2 MYA
ice age human ancestor fossils homo habilis modern man homo sapians mammoth bones rev. war and ww 2
