Jurassic Period
Geological period of the Mesozoic Era, Earth, lasting from 199 to 146 million years ago. It was preceded by the Triassic and followed by the Cretaceous.

This was a time when many important giant dinosaurs flourished on land, as well as ichthyosaurs and plesiosaurs in the sea, and pterosaurs in the air. Mammals were small and insectivore-like, mostly nocturnal. Plants included ferns, cycads, ginkgos, conifers, and equistales. Ammonites, crustaceans, bivalves, sponges, and brachiopods were among the common marine invertebrates. There were a number of minor mass-extinctions during this time.

A small number of authentic Jurassic ecosystems, and a larger number of pseudo-authentic ones, have since been established throughout the galaxy using lazurogened stock.
 
Related Articles
 
Appears in Topics
 
Development Notes
Text by M. Alan Kazlev

Initially published on 25 November 2001.