Changes

The '''Jurassic''' [[period (geology)|period]] is part of the [[geologic system]] of classifying geologic formations.

The '''Jurassic''' [[period (geology)|period]] is a theoretical part of the [[geologic system]] of classifying geologic formations. It should be noted that no one has actually seen the Jurassic period.

The Jurassic period is part of the [[Mesozoic]] era, and is divided into Lower, Middle, and Upper epochs.  The Jurassic is preceded by Permian era and followed by the Cretaceous era.

The Jurassic period is part of the [[Mesozoic]] era, and is divided into Lower, Middle, and Upper epochs.  The Jurassic is preceded by Permian era and followed by the Cretaceous era.