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·Guide fossil: Stromatolites (cyanobacteria)
·Geological event: The layers of the earth begin to form
·Climate event: Glaciations begin to form
·Marine environment -
First microscopic life forms (unicellular and prokaryotic) Later cyanobacteria are incorporated. -
·Guide fossil: Trilobites (arthropods)
·Geological event: Intense volcanism
·Climate event: Oxidizing atmosphere
·Mostly marine environment -
Multicellular algae and the first invertebrates develop, ediacaric organisms also appear. -
An explosion of life arises in which fish develop, the land begins to be colonize by plants and animals, the first amphibians, reptiles and forests appear. -
The Age of Fish, the development of first fish and later jawed fish. -
The colonization of the land begins, first by vegetables, years later fern and coniferous forests erupt. -
The Age of Amphibians, first records of amphibians, this is where the colonization of land by vertebrates begins. -
·Guide fossil: Ammonites (cephalopods)
·Geological event: Pangea fractures
·Climate event: There are no glaciations
·Sea level drops and creatures on land dominate -
The first reptiles to appear were the marine reptiles, including lizards. Then large reptiles like dinosaurs dominated, most of the fossils of this era are theirs. -
Great diversification of plants, especially angiosperms, with flowers and fruits such as eucalyptus. -
·Guide fossil: Nummutiles (marine foraminifera)
·Geological event: Continental drift ends
·Climate event: Last ice ages
·Mostly land environment -
Archeopteryx was the first bird and for a long time it was the only known feathered animal of the Mesozoic. Later in the Cenozoic there was a diversification of these animals derived from dinosaurs. -
Within the Primates Order are located the hominids or great apes. In the Quaternary, the presence of this first hominids appears. -
Then the homosapiens appear, that is, first humans, these were poorly developed, but little by little they have become what we are today.