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Cambrian 570-500 MYA
The Cambrian is the first geological period of the Paleozoic Era, The Cambrian Period marked a profound change in life on Earth; prior to the Cambrian, living organisms on the whole were small, unicellular and simple. These organisms became common among the era. (The age of the marine) (The age of the triobites) -
Ordovician 500-435 MYA
A time period in which Echinoderms which are creatures such as Starfish, Sand dollar , and sea urchins roamed the ocean floor. A time when the Invertebrates were the dominant and the mollusks had become abundant. The ealiest of fish were the Fish that are Jawless and jawed and armored fish as well. (Age of the fish) (Age of the triobites) -
Silurian 435 M- 395M
The earliest terrestrial plants and animals develop or grow, as the Tiktaalik and Eurypterids develop during this particular time as well. (Age of the fish) -
Devonian 395 M- 345M
During this time the armored fish go extinct completely, but an abundance of several species of fish. Earliest amphibians and ammonites start to rise in the period as well. (Age of the amphibians) -
Carboniferous 345M-280M (Mississippian, Pennsylvanian)
The population had turned to be abundant sharks and amphibians. The land had been of large swamps and coal forming forests. This was the period of the earliest reptiles, scale trees and seed ferns. (The age of Coal forrest) (Age of the reptiles) -
Permian 280 M-225M
extinction of many of the marine animals including the triobites. -
Triassic- 225M-195M
The earliest dinosaurs with an abundent of abundant of cycads and conifers also -
Jurassic- 195M-136M
The earliest birds and mammals abundant dinosaurs and ammonites were within this time period. -
Cretaceous- 136M-65M
The earliest flowering plants, climax of dinosaurs followed by their extinction. Great decline of brachiopods and a grand abundance of bony fish. -
Tertiary 65-1.8 MYA
Earliest placental of animals, the modern animals, larger running mammals, and mammals within that present time. (Age of the mammals) -
Quaternary 1.8 MYA - Present
This time there were more carnivors that were larger, there were neanderthals, mastrodoms along with other large mammals or animals, and also till the present day Humans have become of the time as well. (Age of the Humans) (Age of the Mammals)
