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2019-11-19 12:38:58.0 [tstevens] Insert Concept
add narrower relation (PERMIAN [50437b21-5bf8-4e7e-abe0-007b56c09cca,396431] - LOPINGIAN
[219be745-055a-4b37-883a-a0fece613e4f,423353]);
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2019-11-19 12:39:31.0 [tstevens] Insert Concept
add narrower relation (PERMIAN [50437b21-5bf8-4e7e-abe0-007b56c09cca,396431] - GUADALUPIAN
[c78b1ba6-5187-474e-a7ad-fd46cd6d93ae,423357]);
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2019-11-19 12:39:53.0 [tstevens] Insert Concept
add narrower relation (PERMIAN [50437b21-5bf8-4e7e-abe0-007b56c09cca,396431] - CISURALIAN
[7cf7423c-bc51-44ae-bccd-d0cffa85bed9,423361]);
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2019-12-17 08:04:18.0 [tstevens]
insert Definition (id: null
text: The Permian is a geologic period and system which spans 47 million years from
the end of the Carboniferous period 298.9 million years ago (Mya), to the beginning
of the Triassic period 251.902 Mya. It is the last period of the Paleozoic era; the
following Triassic period belongs to the Mesozoic era. The Permian witnessed the diversification
of the early amniotes into the ancestral groups of the mammals, turtles, lepidosaurs,
and archosaurs. The world at the time was dominated by two continents known as Pangaea
and Siberia, surrounded by a global ocean called Panthalassa. The Carboniferous rainforest
collapse left behind vast regions of desert within the continental interior. Amniotes,
which could better cope with these drier conditions, rose to dominance in place of
their amphibian ancestors.
language code: en);
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| definition |
The Permian is a geologic period and system which spans 47 million years from the
end of the Carboniferous period 298.9 million years ago (Mya), to the beginning of
the Triassic period 251.902 Mya. It is the last period of the Paleozoic era; the following
Triassic period belongs to the Mesozoic era. The Permian witnessed the diversification
of the early amniotes into the ancestral groups of the mammals, turtles, lepidosaurs,
and archosaurs. The world at the time was dominated by two continents known as Pangaea
and Siberia, surrounded by a global ocean called Panthalassa. The Carboniferous rainforest
collapse left behind vast regions of desert within the continental interior. Amniotes,
which could better cope with these drier conditions, rose to dominance in place of
their amphibian ancestors.
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