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Jurassic
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The Jurassic is a geologic period and stratigraphic system that lasted about 58.3 million years, spanning from the end of the Triassic Period 201.4 Ma to the beginning of the Cretaceous Period, 143.1
Portrait of Alexandre Brongniart, who coined the term "Jurassic"
Portrait of Alexandre Brongniart, who coined the term "Jurassic"
Folded Lower Jurassic limestone layers of the Doldenhorn nappe at Gasteretal, Switzerland
Folded Lower Jurassic limestone layers of the Doldenhorn nappe at Gasteretal, Switzerland
Middle Jurassic strata in Neuquén Province, Argentina
Middle Jurassic strata in Neuquén Province, Argentina
Tidwell Member of the Morrison Formation (Upper Jurassic), Colorado
Tidwell Member of the Morrison Formation (Upper Jurassic), Colorado
Triassic–Jurassic extinction
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The Triassic–Jurassic extinction event, often called the Triassic–Jurassic mass extinction or end-Triassic extinction, marks the boundary between the Triassic and Jurassic periods, 201.4 million years
Jurassic
…and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province (CAMP). The beginning of the Toarcian Age started around 183 Ma and is marked…
Capitosaurs (such as this Mastodonsaurus) were among the major amphibian groups which became extinct at the T–J boundary, though many may have died ou
Capitosaurs (such as this Mastodonsaurus) were among the major amphibian groups which became extinct at the T–J boundary, though many may have died out earlier.
Reptile extinction at the end of the Triassic is poorly understood, but phytosaurs (such as this Redondasaurus) went from abundant to extinct by the e
Reptile extinction at the end of the Triassic is poorly understood, but phytosaurs (such as this Redondasaurus) went from abundant to extinct by the end of the Rhaetian.
Maximum extent of CAMP volcanism at the Triassic-Jurassic boundary
Maximum extent of CAMP volcanism at the Triassic-Jurassic boundary
The Manicouagan reservoir in Quebec, a massive crater formed by a Late Triassic impact. Radiometric dating has determined that it is about 13 million
The Manicouagan reservoir in Quebec, a massive crater formed by a Late Triassic impact. Radiometric dating has determined that it is about 13 million years older than the Triassic–Jurassic boundary, and thus an unlikely candidate for a mass extinction.