-
Cambrian Period 570-500 MYA
This is the oldest period known to man. It is about 5 times longer than the paleozoic and the mesozoic periods combined.
Periods within the cambrien:
Proterozoic
Archean -
Period: to
Paleozoic
-
Ordovician Period 500-435 MYA
Invertabrates are dominant, mollusks become abundant, and later on some jawless and armored fish come into the world. -
Silurian Period 435- 395 MYA
Earliest terrestrial plants and animals. -
Devonian Period 395- 345 MYA
Armored fish go extinct, but abundance of several species of fish. Earliest amphibians and ammonites -
Carboniferous Period 345- 280 MYA
Some sharks and amphibians a long with large swamps and coal forming forests. -
Permian Period 280- 225 MYA
Extinction of many types of marine animals including trilobites. -
Period: to
Mezosoic Period
-
Triassic Period 225- 195 MYA
Earliest dinosaurs, abundant cycads and conifers. -
Jurassic Period 195- 136 MYA
Earliest birds and mammals, abundant dinosaurs and ammonites. -
Cretacious Period 136- 65 MYA
Climax of dinosaurs followed by their extinction. Great decline of brachiopods. Abundance of bony fish.... and yes thi means tyrannosaurus died. :( -
Period: to
Cenozoic Period
-
Tertiary Period 65- 1.8 MYA
Earliest Placental Mammals, modern mammals, large running mammals. -
Quaternary Period 1.8 MYA- Present
Humans and all the other well known mammals come into place. :P
