Geologic time scale

Divided in Geological periods

https://cgeologos.es/noticia/tabla-de-tiempo-geologico2018

Precambrian

Hadean

Archean

Proterozoic

Phanerozoic

Phaneros -> phenomenon; zoic -> animals. Animal phenomena

Paleozoic

Old animanls

Cambrian

Ordovician

Silurian

Devonian

Carboniferous

Permian

Mesozoic

Middle animals

Triassic

Jurassic

Cretaceous

Cenozoic

keno -> new (from greek). New animals

Paleogene

Neogene

Quaternary

http://www.ucmp.berkeley.edu/help/timeform.php