Early Jurassic (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Early Jurassic epoch (in chronostratigraphy corresponding to the Lower Jurassic series) is the earliest of three epochs of the Jurassic period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 199.6 Ma (million years ago), and ends at the start of the Middle Jurassic (175.6 Ma). Rocks of this age in Europe are called "Lias" and that name was used for the period, as well, in 19th century geology.