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Camnbrian Period
All the life was in the oceans, none have evolved on land yet, the cambrian period happened 570-500 MYA. -
Ordovician
the Ordovician period lasted almost over 45 million yearsduring this period the are north tropics was an ocean. the Ordovician was best known for its diverse marine invertebrates. land plants have been found. -
Silurian
the Silurian period is a geologic period and system that extends from the end of Ordovician. major extinction of marine wildlife. the diversifaction of fish with jaws. -
Devonian
during the devonian era 2 major animal groups colonized the land. tetrapods, and land living vertebrates.3 major continentinal masses North america, Europe, and south america. -
Carboniferous
the carboniferous period lasted from about 359.2 million years to 299 million years ago.this time period was described as the mississippian and pennsylvanian era from mostly limestone and is a result of of differing stratigraphy. -
Permian period
permian period lasted from 299 million years ago to 251 million years ago.the last period of the paleozoic era. distinction of the paleozoic and mesozoic. extinction of ther diapsids and synapsids. permian period also known as the age of the dinosaurs. -
Triassic
Triassic period was the 1st period of the mesozoic era and occured between 251 million years ago and 199 million years ago.beginning of triassic most continents were concetrated in the giant C shaped super continent known as pangea. -
Jurassic period
the jurrasic period 199.6 to 145.5 million years ago plant life and carnivores and plant eaters evolved. dinosaurs dominated the land of fauna.land plants abounded the jurassic. -
Cretacious period
the last portion of the age of the dinosaurs during the cretacious the 1st ceratopism and pachycepalosaurid dinosaurs appeared. the break up of the world continent pangea. end of the cretacious period about 65 million years ago. -
tertiary
form of the geologic period from 66 million to 2.58 million years ago.began with the demise of the non avian dinosaurs in the cretacious palogene extinction event at the start of the cenozoic era and extended to the beginning of the quarternary glaciotan at the end of the pilocene epoch. -
quarternary
geologic time period that encompasses the most recent 2.6 million years including the present day.the quarternary period has involved dramatic changes affected the food resources and bought extinction of many species. rise of a new predator... MAN!!!
