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The cambrian is the first geological period of paleozoic era last from 541.0
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The silurian is a geologic period and system that expands from the end of the Ordovican period.
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The carboniferous is a geologic period and system that exands from the end of Devonian period about 358.9
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The time period of the dinosaurs
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Triassic period in the geologic time the fisrt period of the Mesozoic era.
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This lasted almost 45 million years. During this period , the area north of the tropics . it was covered in oceans
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the marine life
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first land living animals
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The largest mass extintion
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the rocks depostited during this time
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The ice age begian
