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.
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