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The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a bout of violent volcanic eruptions, climate change, or perhaps a fatal run-in with a comet or asteroid—had triggered the extinction of more than 90 percent of Earth's species.
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» Make a correction to this article. » Add information or comments to this article. ... MESOZOIC ERA , in See also: ... epoch . The duration of the Mesozoic era was not more than one See also:
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Following the disturbances of the late Mesozoic era , the geography of North America had by the beginning of the Cenozoic attained substantially its present form. The only areas subjected to inundation by shallow marine waters were the Atlantic and Gulf coasts and a small area on ... Facts and information from other sites...
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; Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era, the "Age of Reptiles." ;
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The Age of Birds and Mammals The Cenozoic Era marked the end of the dinosaurs and the emergence of mammals and birds. Although primitive mammals and birds first appeared in the Mesozoic era, it was not until the ... Please click colored blocks for more information. The Cenozoic Era is divided into two major periods.
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Mesozoic era: Research Mesozoic era articles at HighBeam.com. Find information, facts and related newspaper, magazine and journal articles in our online encyclopedia. HighBeam.com – Research made easy! ... Mesozoic era [Gr.,=middle life], major division of geologic time (see Geologic Timescale , table) from 65 to 225...
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Following the disturbances of the late Mesozoic era ... Pleistocene epoch (plī`stəsēn), 6th epoch of the Cenozoic era of geologic time (see Geologic Timescale , table). ..... Click the link for more information.
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