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Cambrian period 570 - 500 MYA
The Cambrian is the first geological period of the Paleozoic. The Cambrian period marked a profound change in life on Earth. There was a lot of water and a high level of oxygen; this was what caused the life development. Mosley parts of the earth consisted of water, and the organisms lived took place in the water. The high level of oxygen made the animals grow large. -
Ordovician period 488 - 443 MYA
The Ordovician is the second period in the Paleozoic period and it lased for almost 45 million years. At this time mostly of the earth consisted of water. There was a lot of living organisms/animals under water at this time, that does not exist today, but we can find their fossils. -
Silurian period 443 - 417 MYA
The Silurian is the third period in the Paleozoic period. This was the period where a lot of changes in life happened. The earth did still have a huge amount of water but now the fishes started to develop. Also the fist creatures at land started to live, such as relatives of spiders and centipedes. -
Devonian period 418 - 358 MYA
The Devonian is the fourth period in the Paleozoic period. The vegetation of the early Devonian consisted in general of small plants, where the tallest being only a meter tall. Some of the earliest vascular plants started to grow during this period. By the end of the Devonian, ferns, horsetails and seed plans had also appeared, producing the first trees and the first forest. The life did still consist of fish/’’animals’’ under water, and some small insects etc. at land. -
Carboniferous period 359 - 299 MYA
The Carboniferous is the fifth period of the Paleozoic period. This period is known for its vats swamp forest. Such swamps produced the coal we have today. This also made the amniote egg occurred. This gave the ancestors of birds, reptiles etc. to lay their eggs on land without fear of desiccation,- this made the animals grow and reproduce faster. -
Permian period 298 - 251 MYA
The Permian period is the last period of the Paleozoic period. At this time a large recognition of the largest mass extinction recorded in the history of life on earth. Only a few groups survived, 90% of marine species and 70% of terrestrial species died out. During the Permian the land included massive areas of land and water. By the beginning of the Permian, the motion called ’’Pangaea’’ brought all the continents together, to a supercontinent.The dinosaurs came at the end of Permian period. -
Triassic period 252 - 200 MYA
The Triassic is the first period of the Mesozoic Era. This period was mostly hot and dry, which was a factor for why the Pangaea started so separate into two different pieces known as Laurasia to the north and Gondwana to the south. But while separating the climate became more humid. The dinosaurs came during this period, also the first true mammals evolved as well as the first flying vertebrates. There was also a big mass extinction at the end of this period. -
Jurassic period 199 - 145 MYA
The Jurassic period is the second period in the Mesozoic Era. This period is also known as the age of reptiles. Since the Pangaea had rifted up into two pieces, it crated more coastlines and shifted the continental climate from dry to humid, and many of the deserts of the Triassic were replaced by lush rainforest. The land was dominated by dinosaurs. Also the earliest lizards and the evolution of therian mammals occurred. The oceans were inhabited by marine reptiles such as ichthyosaurs and ples -
Cretaceos period 146 - 66 MYA
The Cretaceous is the third and last period of the Mesozoic Era. During this period the dinosaurs starts so die out. There were also many groups of insects, modern mammal and bird groups, and the first flowering plants. The Pangea breakup, which now began to disperse during the Jurassic, continued. This made a lot of differences between the northern and southern continents in climate. The Cretaceous was the period where some of the life we have today started to grow. -
Tertiary period 65 - 1,8 MYA
The Tertiary is the first period of the Cenozoic era. The Tertiaty period begins with a catastrophe that killed off the dinosaurs. With nearly all of the dinosaurs gone, there were plenty of place for the other organisms/animals to live and grow. This is where our ancestors start to take life. The continents continued to drift apart. The plate tectonics causes a lot of volcanoes. It also made the mountains we have today. The tertiary period ended with the planet getting cool enough, and the big -
Quaterntary period 1,7 MYA - (until 2013)
The Quaternary period is the second and last period in the Cenozoic era – and it is still going on today. In the beginning of quaternary period the first human being took place, in Africa. The climate was on the cooler side, with ice ages coming and going every forty thousand years or so. But the glaciers have always been there (some still are). The climate got warmer and warmer, up to how it’s like today. The human/and animals has changed through time. We human being has made a lot of the natur
