Geology timeline

Paleozoic Era: 570 millon years ago

Jan 1, 1909

570 million years - 225 million years
The first era of Earth, periods consisted of: Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.

Geology timeline

Period: Jan 1, 1909 to Jan 1, 2009

Cambrian Period: 500 million years ago

Jan 1, 1921

570 million years - 500 million years
Earliest abundant record of marine life, trilobites are dominant.

Ordovcian Period: 435 million years ago

Jan 1, 1932

500 million years - 435 million years
Earliest fishes, invertebrates dominant, coelentrates and mollusks become abundant, echinoderms expand in numbers and kinds.

Silurian Period: 395 millon years ago

Jan 1, 1939

435 million years - 395 million years
Earliest terrestrial plants and animals, peak development of eurypterids.

Devonian Period: 345 million years ago

Jan 1, 1948

395 million years - 345 million years
Earliest amphibians and ammonites, extenction of armored fishes, many fishes abundant.

Carboniferous Period: 280 million years ago

Jan 1, 1959

345 million years - 280 million years
Earliest reptiles, great coal forming forests, sbundant sharks and amphibians, large and numerous scale trees and seed ferns.

Permian Period: 225 million years ago

Jan 1, 1969

280 million yers - 225 million years
Extinction of many kinds of marine animals, including the trilobites, little change in terrestrial animals.

Mesozoic Era: 225 million years ago

Jan 1, 1974

225 million years - 65 million years
The second era of earth, it consisted of the Triassic, Jurassic and Cretaceous.

Triassic Period: 195 millon years ago

Jan 2, 1974

225 million years - 195 million years
Earliest dinosaurs, abundant cycades and conifers.

Jurassic Period: 136 million years ago

Jan 1, 1984

195 million years - 136 million years
Earliest birds and mammals, abundant dinosaurs and ammonites.

Cretaceous Period: 65 million years ago

Jan 1, 1997

136 million years - 65 million years
Earliest flowering plants, climax of dinosaurs and ammonies followed by extinction, great decline of brachiopods, great development of bony fish.

Cenozoic Era: 65 million years ago

Jan 1, 2008

65 million years - present
The era we are in now.

Tertiary Period: 65 million years ago

Jan 2, 2008

65 million years - present
Humans, mastadons, mammoths, large carnivores, abundant grazing animals, large running mammals, many modern types of mammals, earliest placental mammals.

Quaternary Period: Now

Jan 1, 2009

The period of now