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The Jurassic period is named for the Jura Mountains in Europe. The limestone in those mountains dates to the Jurassic.
Jurassic period
after Jurrasic period it is the Cretaceous period
in the Jurassic period the atmosphere was about 14.7.
The Middle Jurassic Epoch (175.6 - 161.2Ma) was in the Jurassic Period (199.6 - 145.5Ma).