-
541 BCE
Cambrian period
Many marine invertebrates with external skeletons -
Period: 541 BCE to 252 BCE
Paleozoic Era
The Paleozoic or Paleozoic era is a division of the geological time scale that belongs to the Phanerozoic eon, with the category of era (as time) and erathem (as a set of rocks). -
Period: 541 BCE to 485 BCE
Cambrian period
-
485 BCE
Ordovician period
Widespreadmarine algae fish without jaws -
Period: 485 BCE to 444 BCE
Ordovician period
-
444 BCE
Silurian period
First land plantas -
Period: 444 BCE to 419 BCE
Silurian period
-
419 BCE
Devonian period
Fish diversity
first amphibians -
Period: 419 BCE to 359 BCE
Devonian period
-
359 BCE
Carboniferous period
Forest of giant fems
First reptiles -
Period: 359 BCE to 299 BCE
Carboniferous period
-
299 BCE
Permian period
Reptiles diversity -
Period: 299 BCE to 252 BCE
Permian period
-
252 BCE
Triassic period
First dinosaurs
First mammals -
Period: 252 BCE to 66 BCE
Mesozoic Era
The Mesozoic, was Mesozoic or secondary era, known zoologically as the age of the dinosaurs or botanically as the age of the cycads -
Period: 252 BCE to 201 BCE
Triassic period
-
201 BCE
Jurassic period
Gymnosperm plants dominate the Earth,s surface
Dinosaurs diversity
First flying and aquatic reptiles
First birds -
Period: 201 BCE to 145 BCE
Jurassic period
Gymnosperm plants dominate the Earth,s surface
Dinosaurs diversity
First flying and aquatic reptiles
First birds -
145 BCE
Cretaceous period
First plants with flowers
Extinction of dinosaurs and ammonites -
Period: 145 BCE to 66 BCE
Cretaceous period
-
66 BCE
Tertiary period
development and diversification of mammals
alpine orogeny begins -
Period: 66 BCE to 10
Cenozoic Era
The Cenozoic Era began with the extinction of the dinosaurs approximately 66 million years ago. ... It is also known as the "Age of mammals", since this was the privileged way of life throughout its 66 million years of duration. Furthermore, it is the Age in which the human being made his appearance. -
Period: 66 BCE to 2 BCE
Tertiary period
-
2 BCE
Quarternary period
development and diversification of mammals
Glaciaton in the Northern Hemisphere -
Period: 2 BCE to 10
Quaternary period