Permian Period - definition. What is Permian Period
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%ما هو (من)٪ 1 - تعريف

SIXTH AND LAST PERIOD OF THE PALEOZOIC ERA
Permian Period; Permium; Ufimian; Permian period; Permian era; Permian age; Permian Era; Upper Permian; Oberperm; Permian Age; Permian system; Permian (geology); Perm (geology); Perm era; Mid-Permian; Climate of the Permian; Dyassic
  • Geography of the Permian world
  • [[Life reconstruction]] of Permian [[wetland]] environment, showing a [[Eryops]]
  • genera]] which produce large numbers of [[fossil]]s
  • ''[[Hercosestria]] cribrosa'', a [[reef]]-forming productid brachiopod (Middle Permian, Glass Mountains, Texas)
  • permocupedid]] beetle from the Middle Permian of Russia
  • glacial pavement]] of Permian age
  • Map of the world at the Carboniferous-Permian boundary, showing the four floristic provinces
  • weigeltisaurid]] from the Late Permian of Europe. Weigeltisaurids represent the oldest known gliding vertebrates.

Permian         
·noun The Permian period. ·see Chart of Geology.
II. Permian ·adj Belonging or relating to the period, and also to the formation, next following the Carboniferous, and regarded as closing the Carboniferous age and Paleozoic era.
Permian         
['p?:m??n]
¦ adjective Geology relating to or denoting the last period of the Palaeozoic era (between the Carboniferous and Triassic periods, about 290 to 245 million years ago), a time when reptiles proliferated and many marine animals became extinct.
Origin
C16: from Perm, a Russian province with extensive deposits from this period.
Permian Basin Shooting Stars         
Permian Basin Shootin' Stars
The Permian Basin Shooting Stars were a soccer club based in Odessa, Texas that competed in the SISL and USISL. For the 1991/92 indoor season, the team was renamed the Permian Basin Mirage.

ويكيبيديا

Permian

The Permian ( PUR-mee-ən) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period 298.9 million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the region of Perm in Russia.

The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids (reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these drier conditions, rose to dominance in place of their amphibian ancestors.

Various authors recognise at least three, and possibly four extinction events in the Permian. The end of the Early Permian (Cisuralian) saw a major faunal turnover, with most lineages of primitive "pelycosaur" synapsids becoming extinct, being replaced by more advanced therapsids. The end of the Capitanian Stage of the Permian was marked by the major Capitanian mass extinction event, associated with the eruption of the Emeishan Traps. The Permian (along with the Paleozoic) ended with the Permian–Triassic extinction event, the largest mass extinction in Earth's history (which is the last of the three or four crises that occurred in the Permian), in which nearly 81% of marine species and 70% of terrestrial species died out, associated with the eruption of the Siberian Traps. It took well into the Triassic for life to recover from this catastrophe; on land, ecosystems took 30 million years to recover.