Geologic Time Scale With Links To Paleomaps

EONERA PERIODEPOCHDATES*AGE ofEvents
Phanerozoic|Cenozoic |QuaternaryHolocene0-2MammalsHumans
Pleistocene
Tertiary|Neogene  |Pliocene2-5
Miocene5-24
Paleogene|Oligocene24-37
Eocene37-58
Paleocene58-66Extinction of dinosaurs
MesozoicCretaceous66-144ReptilesFlowering plants
Jurassic144-2081st birds/mammals
Triassic208-245First Dinosaurs
Paleozoic|Permian245-286|AmphibiansEnd of trilobites
Carboniferous|Pennsylvanian286-320First reptiles
Mississippian320-360 Large primitive trees
Devonian360-408|FishesFirst amphibians
Silurian408-438First land plant fossils
Ordovician438-505|Invertebrates|First Fish
Cambrian505-5701st shells, trilobites dominant
Proterozoic |Also known as Precambrian570-2,5001st Multicelled organisms
Archean2,500-3,8001st one-celled organisms
Hadean3,800-4,600Approx age of oldest rocks 3,800

* Note: Dates are in millions of years

Taken from: MODERN PHYSICAL GEOLOGY, Graham R. Thompson Ph.D., Jonathan Turk Ph.D., Saunders College Publishing.

Links lead to period paleomaps created by Chrisopher R. Scotese for the Paleomap Project. The project illustrates the plate tectonic development of the ocean basins and continents, as well as the changing distribution of land and sea during the past 1100 million years. All links open into a new window.