Braydon's Geologic Timeline

Cambrian Period (570-500 MYA)

Period: Feb 9, 1914 to Feb 8, 1926

-Triolovites were dominant.
-All of the eath was oceans with growing granite continents.
-All life was marine life.

Ordovician Period (500-435 MYA)

Period: Feb 9, 1926 to Feb 9, 1937

-Earliest fishes appear
-Invertebraets are the dominant species
-Molusks become abundant

Silurian Period (435-395 MYA)

Period: Feb 10, 1937 to Feb 10, 1944

-Earliest terrestrial (land) animals
-Earliest development of euryplerids

Devonian Period (395-345 MYA)

Period: Feb 10, 1944 to Feb 10, 1956

-Earliest amphibians and ammonites
-Extinction of armored fishes

Carboniforous Period (345-280 MYA)

Period: Feb 10, 1956 to Feb 10, 1967

-Earliest reptiles
-Great coal forming forests flourished
-Sharks and amphibians were abundant at this time
-Large number of scale trees and seed ferns

Permian Period

Period: Feb 10, 1967 to Feb 10, 1974

-Extinction of any kinds of marine animals, including trilobites
-Little change in terrestrial animals

Triassic Period (225-195 MYA)

Period: Feb 11, 1974 to Feb 11, 1979

-Earliest dinosaurs
-Abundant cycades and conifers

Jurassic Period (195-136 MYA)

Period: Feb 11, 1979 to Feb 11, 1989

-Earliest birds and mammals apear at this time
-Dinosaurs were the domant species

Cretacious Period (136-65 MYA)

Period: Feb 11, 1989 to Feb 11, 2002

-Earliest flowering plants
-Climax of the dinosaurs and ammonites--followed by their extinction
-Great decline of brachiopods
-Great development of bony fishes

Tertiary Period (65 MYA-Present day)

Period: Feb 11, 2002 to Feb 11, 2015

-Humans, mastodons, and mamoths roam the earth
-Abundance of grazing animals and large running mammals
-Earliest placental mammals exist