The Toarcian Stage was the last
faunal stageof the Early Jurassicperiod. It is usually used to cover the period from 183 Ma to 175 Ma (million years ago).
The Toarcian stage began with the
Toarcian turnover, the extinction eventthat set it apart from the previous Pliensbachianstage. The Toarcian takes its name from the town of Thouars, just south of Saumurin the Loire Valleyof France.
In Europe this period is also known as the Upper Lias Stage.
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toarcian — TOARCIÁN s.n. (geol.) Etaj al jurasicului inferior (lias). // adj. Care aparţine acestui etaj. [pron. to ar ci an, pl. ieni, iene. / < fr. toarcien]. Trimis de LauraGellner, 13.09.2007. Sursa: DN TOARCIÁN, Ă adj., s … Dicționar Român
Toarcian — … Useful english dictionary
Toarcian turnover — The term Toarcian turnover, alternatively the Toarcian extinction, the Pliensbachian Toarcian extinction, or the Early Jurassic extinction, refers to the wave of extinctions of that marked the end of the Pliensbachian stage and the start of the… … Wikipedia
Toarcian Stage — ▪ geology uppermost of the four divisions of the Lower Jurassic Series, representing all rocks formed worldwide during the Toarcian Age, which occurred between 183 million and 175.6 million years ago during the Jurassic Period. The Toarcian … Universalium
Pliensbachian — System Series Stage Age (Ma) Cretaceous Lower Berriasian younger Jurassic Upper Tith … Wikipedia
Anoxic event — As early as 1911, major oceanic currents were well mapped and understood, albeit without today s understanding of how they affect regional and global climatological conditions … Wikipedia
Pelagosaurus — Temporal range: 183–176 Ma … Wikipedia
Steneosaurus — Temporal range: 183–142 Ma … Wikipedia
Jurassic — Period 199.6–145.5 million years ago … Wikipedia
Jurassic Period — Interval of geologic time, 206–144 million years ago, that is one of the three major divisions of the Mesozoic Era, preceded by the Triassic Period and followed by the Cretaceous. During the Jurassic, Pangea began to break up into the present day … Universalium