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Permian
Each year reprisents a million years and the Permian Period lasted 48 million years. Additionally, the Permian Period started 299m.y.a. and ended 251m.y.a. Part of the "Age of Amphibians" -
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Asselian
280 to 290 m.y.a. -
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Sakmarian
269 to 280 m.y.a. -
Early Permian Ends
In early Permian, reptiles became more dominant than amphibians due to their ability to adapt to large differences in climate between night and day. -
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Artinskian
260 to 269 m.y.a. -
Pangaea begins drifting
Pangaea drifts northward, ending ice ages in south. Deserts form. Results of this drifting is a warming trend throughout Pangaea. -
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Kungurian
256 to 260 m.y.a. -
Pangea Completeing Formation
In early Permian the southern hemisphere was covered in continental glaciers creating ice ages. In the middle of Pangea deserts developed. Shallow continental seas dried up during the Permian resulting in very few reefs in the later Permian. Additionally, the Carboniferous Forest-Swamps were being replaced throughout the Permian period by drought resistant plants such as conifers, and seed ferns. -
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Ufimian-Kazanian
254 to 256 m.y.a. -
Late Permian Starts
Throughout the middle and late Permian, reptiles evolved and became warm-blooded and were like mammals in many aspects. They were called therapsids and were the precursers of actual mammals. -
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Tatarian
248 to 254 m.y.a. -
Permian Extinction
The Permian Extinction is the worst extinction the world has ever experienced. This extinction killed about 96% of all species of the time. It is believed more than 90% of all marine life was eliminated and 70% of all land life. Scientists are yet unsure of the cause of this extinction. -
Decline in Amphibians
Reptiles become more dominant, signaling the end of the Paleozoic era, or lapsing into the "Age of Reptiles" in lieu of amphibians. Trilobites are entirely extinct. (Approximate)