| 11. | Geologically, the mountain is a laccolith, dating from the Cenozoic era.
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| 12. | These massive lakes gradually vanished as the Cenozoic era proceeded.
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| 13. | During the ensuing Tertiary period of the Cenozoic era, sea levels also varied substantially.
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| 14. | Into the Cenozoic era, geologic processes elevated the state's topography.
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| 15. | Most of Arizona was dry land during the Cenozoic era.
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| 16. | It also features limestones and dolomites from the Cenozoic era.
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| 17. | It formed during the Alpine orogeny of the Cenozoic Era.
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| 18. | Uplift continued until the middle of the Cenozoic Era.
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| 19. | Today, only a small part of the original range, rejuvenated in the Cenozoic Era, remains.
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| 20. | The uplift of the Rocky Mountains persisted into the early part of the Cenozoic era.
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