| 21. | Geologic upheaval during the early Cenozoic era formed the state's basin and range physiographic province.
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| 22. | Primates are thought to have developed several of their Cenozoic era, when insects became more numerous.
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| 23. | The sea covering southern Alabama remained in place during the early part of the Cenozoic era.
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| 24. | The eruptions took place in the Cenozoic era.
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| 25. | The event marks the end of the Mesozoic Era, and the beginning of the Cenozoic Era.
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| 26. | During the early Cenozoic era, the sea began to retreat from Montana for the last time.
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| 27. | Alaska remained tectonically active into the Cenozoic era.
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| 28. | The ensuing Tertiary period of the Cenozoic era is also missing from the local rock record.
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| 29. | It has nearly vertical layers with continual exposure from the Permian period to the Cenozoic era.
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| 30. | The Cenozoic Era spanned a length of time from 66 million years ago to the present.
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