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.
Under the uniformitarian dates assigned by secular geologists, it represents approximately the period of Earth's history from 200 million years ago to 145 million years ago. Young Earth creationists reject these dates (see geologic system).
- Online Etymology Dictionary
- Jurassic Period (Department of Earth Science, University of California, Santa Barbara).
- Gradstein, F.M., and Ogg, J.G.,Geologic Time Scale 2004 – Why, How, and Where Next!