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Late Triassic



 
 
The Late Triassic is in the geologic timescale the third and final of three epochs of the Triassic
Triassic

The Triassic is a geologic period that extends from about 251 to 199 annum . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic....
 period. The corresponding series
Series (stratigraphy)

Series are subdivisions of stratum made based on the age of the rock. A series is therefore a chronostratigraphy unit, unrelated to lithostratigraphy, which divides rock layers on their lithology....
 is known as the Upper Triassic. In the past it was sometimes called the Keuper
Keuper

The Keuper is a lithostratigraphy unit in the subsurface of large parts of west and central Europe. The Keuper consists of dolostone, shales or claystones and evaporites that were deposited during the Middle Triassic and Late Triassic epochs ....
, after a German lithostratigraphic
Lithostratigraphy

Lithostratigraphy is a sub-discipline of stratigraphy, the geology science associated with the study of stratum or rock layers. Major focuses include geochronology, comparative geology, and petrology....
 group
Group (stratigraphy)

A group is in stratigraphy a lithostratigraphy unit, a part of the geologic record that consists of defined stratum. Groups are divided into formation and are sometimes themselves grouped into "supergroups"....
 (a sequence of rock strata) that has a roughly corresponding age. The Late Triassic spans the time between 228.0 ± 2 Ma
Annum

Annum is one form of the Latin noun meaning year, not a form normally used for derivatives in modern languages: the accusative case Grammatical number of the second declension grammatical gender noun annus , anni ....
 and 199.6 ± 0.6 Ma (million years ago).






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The Late Triassic is in the geologic timescale the third and final of three epochs of the Triassic
Triassic

The Triassic is a geologic period that extends from about 251 to 199 annum . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic....
 period. The corresponding series
Series (stratigraphy)

Series are subdivisions of stratum made based on the age of the rock. A series is therefore a chronostratigraphy unit, unrelated to lithostratigraphy, which divides rock layers on their lithology....
 is known as the Upper Triassic. In the past it was sometimes called the Keuper
Keuper

The Keuper is a lithostratigraphy unit in the subsurface of large parts of west and central Europe. The Keuper consists of dolostone, shales or claystones and evaporites that were deposited during the Middle Triassic and Late Triassic epochs ....
, after a German lithostratigraphic
Lithostratigraphy

Lithostratigraphy is a sub-discipline of stratigraphy, the geology science associated with the study of stratum or rock layers. Major focuses include geochronology, comparative geology, and petrology....
 group
Group (stratigraphy)

A group is in stratigraphy a lithostratigraphy unit, a part of the geologic record that consists of defined stratum. Groups are divided into formation and are sometimes themselves grouped into "supergroups"....
 (a sequence of rock strata) that has a roughly corresponding age. The Late Triassic spans the time between 228.0 ± 2 Ma
Annum

Annum is one form of the Latin noun meaning year, not a form normally used for derivatives in modern languages: the accusative case Grammatical number of the second declension grammatical gender noun annus , anni ....
 and 199.6 ± 0.6 Ma (million years ago). The Late Triassic is divided into the Carnian
Carnian

The Carnian is the lowermost stage of the Upper Triassic series . Its boundaries are not characterized by major extinctions or biotic turnovers, but a climatic event occurred during the Carnian and seems to be associated with important extinctions or biotic radiations....
, Norian
Norian

The Norian Stage was a portion of the Triassic geological period. It dates from 216.5 ? 2.0 to 203.6 ? 1.5 Mya . It was preceded by the Carnian Stage and succeeded by the Rhaetian Stage....
 and Rhaetian
Rhaetian

PaleogeographyAt this stage, Pangaea began to break-up, though the Atlantic Ocean was not yet formed....
 age
Age

Age may refer to:The length of time that an organism has lived:*aging, for the social, cultural, and economic factors of human age and aging....
s.

Many of the first dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s evolved during the Late Triassic, including Plateosaurus
Plateosaurus

Plateosaurus is a genus of Plateosauridae prosauropoda dinosaur that lived during the Norian and Rhaetian stages of the Late Triassic Period , around 216 to 199 annum in what is now Europe....
, Coelophysis
Coelophysis

Coelophysis , meaning "hollow body form" in reference to its hollow bones , is one of the earliest known genus of dinosaur. It was a small, carnivore biped from North America....
, and Eoraptor
Eoraptor

Eoraptor was one of the world's earliest dinosaurs. It was a Biped Carnivore that lived between 230 and 225 million years ago, in what is now the northwestern region of Argentina....
.

See also

  • Triassic-Jurassic extinction event
    Triassic-Jurassic extinction event

    The Triassic?Jurassic extinction event marks the boundary between the Triassic and Jurassic periods, , and is one of the major extinction events of the Phanerozoic eon, profoundly affecting life on land and in the oceans....