Geological Time Table

    Period Millions of Years Ago Life Forms
P
H
A
N
E
R
O
Z
O
I
C
Ceneozoic Quaternary Holocene 10,000 years ago Man, flourishing of mammals,
Ice Age
Pleistocene 2.6
Tertiary Pliocene 5 - 2.5 First hominids, horses, caninetapirs, rodents
Miocene 23 - 5
Oligocene 33 - 23
Eocene 54 - 33
Paleocene 65 - 24
Mesozoic Cretaceous   146 - 65 marine invertebrates, marsupials, pterosaurs
Jurassic   208 - 146 Suaropods, birds, flowering plants
Triassic   248 - 248 First mammals, turtles, ichtyosaur, first dinosaurs, flying reptiles
Paleozoic Permian   280 - 248 More abundance of amphibians and reptiles
Pennsylvanian (Carboniferous)   325 - 280 First reptiles, ferns, cockroaches
Mississippian   360 - 325 First winged insects
Devonian   408 - 360 Fish, sharks, first amphibians, and land plants
Silurian   438-408 First jawed fishes, first insects, first plants
Ordovician   505 - 438 First primitive plants, corals, fungi, primitive fish
Cambrian   575 - 500 Trilobites,mollusks, brachiopods, algae
pre cambrian
Proterozoic Late Pre-Cambrian   575  
Archeozoic Early Pre-cambrian   2500  

 

 

 

 
 
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