Early jurassic


Early Jurassic - the oldest age of the jury (the Mesozoic era), lasting about 24 million years (199.6 ± 0.6 to 175.6 ± 2.0 million years ago). The early jura is divided into four centuries: hettang, synemur, pliensbach and toark.

The Chronostratigraphic equivalent of the Early Jurassic is a branch of the lower jura (traditionally also called lias or black yurus, primarily for determining the non-alpine regions of northwestern Europe). The lower jura is divided into four floors: hettang, synemur, pliensbach and toark. Authoritative control (Branch):

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