Period: 4570 BCE to 541 BCE
PrecambrianGuide fossils : Stromatolites (cianobacterias)
Climate event : Incresing of the salt in the sea , in consequence of the heavies precipitations.The first glaciation occurs and a oxigenated atmosphere is created.
Geological event : There was a big bombardement, the Earth, the moon and the litosphere was formed. Origin and early evolution of the Earth.
Cambrian periodPluricellular algae
Period: 511 BCE to 485 BCE
PalezoicGuide fossils : Trilobites anthropoid .
Geological event : Hercinic orogeny, a lot of mountain ranges were formed.
Climate events : Greenhouse effect, hight volcanic activity, reduction of coastlines and marine platforms by the formation of the Pangeas super continent.
Ordovician periodMain groups of invertebrates , fishes.
Period: 443 BCE to 419 BCE
Silurian periodVegetables( gymnosperms, rootless, leafless, flowerless, reproduced by spores) and invertebrates.
Period: 419 BCE to 359 BCE
Period: 359 BCE to 299 BCE
Carboniferous periodConifers, ferns and main reptiles.
Period: 299 BCE to 252 BCE
PermianAmphibians and pelycosaurus.
Extinction of 90% of marine species and 70% of terrestrial species, caused by the heating of rocks
Period: 252 BCE to 66 BCE
MesozoicGuide fossils : Belemnites and Ammonites (cephalopod mollusk).
Geological events : It started to separate Pangea and the continents ,it was originated the Athlantic ocean and the Alpina orogenic.
Climate events : Climatic conditions of extreme aridity , most of all, inside Pangea, it is going to evolve to a tropical and humid climate.
Period: 66 BCE to
CenozoicGuide fossils : Nummulites.
Geological events :Complete development of the Alpine orogeny, the isthmus of Panama is formed 3am ago. Formulation of the current polar caps.
Climate events : Colder and warmer periods called glacial and interglacial periods.
NeogeneAppear the first hominids
Period: 2 to
QuaternaryAppear of the homo Sapiens
Period: 66 to 2
PalaogeneAngiosperm plants (with flower), birds and mammals