An Etymological Dictionary of Astronomy and Astrophysics
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→ Jurassic era.

Named for the Jura Mountains on the border between France and Switzerland, where rocks of this age were first studied, + -assic, suffix extracted from Triassic.

A period of the Mesozoic era, spanning the time between the Triassic and the → Cretaceous periods, about 200 to 145 million years ago. The start of the period is marked by the major Triassic-Jurassic → mass extinction event.

→ Jurassic; → era.