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2019-10-09 08:02:24.0 [tstevens] Insert Concept
add broader relation (UPPER [35aa6f1d-da5b-473d-b95c-24ba82cc0780,369353] - TRIASSIC
[b44427cd-4b20-42a3-9e14-8d1f6d8399d5,336091]);
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2019-10-09 08:08:03.0 [tstevens] Insert Concept
add narrower relation (UPPER [35aa6f1d-da5b-473d-b95c-24ba82cc0780,369353] - RHAETIAN
[ff133a4b-a23a-4710-93d3-2b802b21c8c4,369365]);
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2019-10-09 08:08:18.0 [tstevens] Insert Concept
add narrower relation (UPPER [35aa6f1d-da5b-473d-b95c-24ba82cc0780,369353] - NORIAN
[11fdca69-e5fb-4b41-97e5-de678fd7eade,369369]);
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2019-10-09 08:08:34.0 [tstevens] Insert Concept
add narrower relation (UPPER [35aa6f1d-da5b-473d-b95c-24ba82cc0780,369353] - CARNIAN
[db75736c-28be-470c-b532-71b81ca3fbcd,369373]);
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2019-10-11 15:32:18.0 [tstevens]
insert Definition (id: null
text: The Late (Upper) Triassic is the third and final of three epochs of the Triassic
Period in the geologic timescale. The Triassic-Jurassic extinction event began during
this epoch and is one of the five major mass extinction events of the Earth. The corresponding
series is known as the Upper Triassic. In Europe the epoch was called the Keuper,
after a German lithostratigraphic group (a sequence of rock strata) that has a roughly
corresponding age. The Late Triassic spans the time between 237 Ma and 201.3 Ma (million
years ago). The Late Triassic is divided into the Carnian, Norian and Rhaetian ages.
Many of the first dinosaurs evolved during the Late Triassic, including Plateosaurus,
Coelophysis, and Eoraptor.
The extinction event that began during the Late Triassic resulted in the disappearance
of about 76% of all terrestrial and marine life species, as well as almost 20% of
taxonomic families. Although the Late Triassic Epoch did not prove to be as destructive
as the preceding Permian Period, which took place approximately 50 million years earlier
and destroyed about 70% of land species, 57% of insect families as well as 95% of
marine life, it resulted in great decreased in population sizes of many living organism
populations.
Specifically, the Late Triassic had negative effects on the conodonts and ammonoid
groups. These groups once served as vital index fossils, which made it possible to
identify feasible life span to multiple strata of the Triassic strata. These groups
were severely affected during the epoch, and became extinct soon after. Despite the
large populations that withered away with the coming of the Late Triassic, many families,
such as the pterosaurs, crocodiles, mammals and fish were very minimally affected.
However, such families as the bivalves, gastropods, marine reptiles and brachiopods
were greatly affected and many species became extinct during this time
language code: en);
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| definition |
The Late (Upper) Triassic is the third and final of three epochs of the Triassic Period
in the geologic timescale. The Triassic-Jurassic extinction event began during this
epoch and is one of the five major mass extinction events of the Earth. The corresponding
series is known as the Upper Triassic. In Europe the epoch was called the Keuper,
after a German lithostratigraphic group (a sequence of rock strata) that has a roughly
corresponding age. The Late Triassic spans the time between 237 Ma and 201.3 Ma (million
years ago). The Late Triassic is divided into the Carnian, Norian and Rhaetian ages.
Many of the first dinosaurs evolved during the Late Triassic, including Plateosaurus,
Coelophysis, and Eoraptor.
The extinction event that began during the Late Triassic resulted in the disappearance
of about 76% of all terrestrial and marine life species, as well as almost 20% of
taxonomic families. Although the Late Triassic Epoch did not prove to be as destructive
as the preceding Permian Period, which took place approximately 50 million years earlier
and destroyed about 70% of land species, 57% of insect families as well as 95% of
marine life, it resulted in great decreased in population sizes of many living organism
populations.
Specifically, the Late Triassic had negative effects on the conodonts and ammonoid
groups. These groups once served as vital index fossils, which made it possible to
identify feasible life span to multiple strata of the Triassic strata. These groups
were severely affected during the epoch, and became extinct soon after. Despite the
large populations that withered away with the coming of the Late Triassic, many families,
such as the pterosaurs, crocodiles, mammals and fish were very minimally affected.
However, such families as the bivalves, gastropods, marine reptiles and brachiopods
were greatly affected and many species became extinct during this time
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