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2019-10-08 15:41:35.0 [tstevens] Insert Concept
add narrower relation (CRETACEOUS [0d7a2c62-d0b0-4a13-8412-d7cc8d68aeff,336049] -
UPPER [d3928482-e056-4d2d-ae5a-1e7097099c2b,369237]);
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2019-10-09 07:10:28.0 [tstevens] Insert Concept
add narrower relation (CRETACEOUS [0d7a2c62-d0b0-4a13-8412-d7cc8d68aeff,336049] -
LOWER [db06b2a9-4ed5-4222-8533-fbf3ed3bdc23,369245]);
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2019-10-09 08:42:51.0 [tstevens]
insert Definition (id: null
text: The Cretaceous is usually noted for being the last portion of the "Age of Dinosaurs",
but that does not mean that new kinds of dinosaurs did not appear then. It is during
the Cretaceous that the first ceratopsian and pachycepalosaurid dinosaurs appeared.
Also during this time, we find the first fossils of many insect groups, modern mammal
and bird groups, and the first flowering plants.
The breakup of the world-continent Pangea, which began to disperse during the Jurassic,
continued. This led to increased regional differences in floras and faunas between
the northern and southern continents.
The end of the Cretaceous brought the end of many previously successful and diverse
groups of organisms, such as non-avian dinosaurs and ammonites. This laid open the
stage for those groups which had previously taken secondary roles to come to the forefront.
The Cretaceous was thus the time in which life as it now exists on Earth came together.
language code: en);
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| definition |
The Cretaceous is usually noted for being the last portion of the "Age of Dinosaurs",
but that does not mean that new kinds of dinosaurs did not appear then. It is during
the Cretaceous that the first ceratopsian and pachycepalosaurid dinosaurs appeared.
Also during this time, we find the first fossils of many insect groups, modern mammal
and bird groups, and the first flowering plants.
The breakup of the world-continent Pangea, which began to disperse during the Jurassic,
continued. This led to increased regional differences in floras and faunas between
the northern and southern continents.
The end of the Cretaceous brought the end of many previously successful and diverse
groups of organisms, such as non-avian dinosaurs and ammonites. This laid open the
stage for those groups which had previously taken secondary roles to come to the forefront.
The Cretaceous was thus the time in which life as it now exists on Earth came together.
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