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Is the first geological period of the Paleozoic Era. The end of the Cambrian Period is marked by evidence in the fossil record of a mass extinction event some 490 million years ago.
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It is the first and longest stage in the history of the Earth This supereon began when the Earth was formed. It lasted approximately 4027 million years.
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is a division of the geological time scale that belongs to the Phanerozoic eon, with the category of era (as time) and erathem (as a set of rocks). It began 541 million ago years and ended about 252 million years ago.
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The first amphibians emerge. Several lines of terrestrial arthropods also proliferate -
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known biologically as the age of dinosaurs or botanically as the age of cycads.
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The Jurassic is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201.3 million years ago .
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It began 145 million years ago and ended 66 million years ago.2 With a duration of about 79 million years, it is the longest Phanerozoic period, and is even longer than the entire Cenozoic Era.
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The quaternary period began 2.6 million years ago and extends into the present. Climate change and the developments it spurs carry the narrative of the Quaternary.
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it is the geological era that began about 66 millon years ago and that extends to the present dat , it is the thitd and last era of the Phanerozocic eon and follows the Mesozoic era .
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It is the geological era that began about 66 million years ago and continues to the present day. It is the third and last era of the Phanerozoic eon and follows the Mesozoic era. Its name comes from the Greek language and means "new animals".
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In the case of this period, both the beginning and the end are marked by important extinction events: the Permian-Triassic mass extinction and the Triassic-Jurassic one.
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The Permian period, which ended with the largest mass extinction Earth has ever known, began about 299 million years ago.
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The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.and was coined by geologists William Conybeare and William Phillips in 1822, based on a study from British rocks.
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During the Devonian, about 365 million years ago, the first amphibians emerged. At the end of the period there was the mass extinction of the Devonian, severely affecting marine life.
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During this time, the continental land masses were low and the sea level was rising. Possibly the biological event was the evolution and diversification of the fish.
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The Ordovician is the fragmentation of the geological time scale that belongs to the Paleozoic Era; this is divided into six periods of which the Ordovician occupies the second place after the Cambrian and preceding the Silurian.