| 21. | The Mesozoic Era began some 245 million years ago and ended about 65 million years ago.
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| 22. | It was during the Mesozoic era that the ancestors of many of the living gastropods evolved.
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| 23. | This region was born during the breakup of the supercontinent Pangea in the early Mesozoic Era.
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| 24. | The rock layers involved were formed in the Triassic und Jurassic periods of the Mesozoic era.
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| 25. | These basement rocks were created during the late Mesozoic era, long before the Itcha Range formed.
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| 26. | During the Mesozoic era, continued erosion along this ridge exposed its younger, more soluble limestone layers.
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| 27. | The event marks the end of the Mesozoic Era, and the beginning of the Cenozoic Era.
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| 28. | The strata date back to the Late Cretaceous epochs of the Cretaceous period, during the Mesozoic Era.
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| 29. | Most dinosaurologists think the chances of a dinosaur surviving from the Mesozoic Era are just about zgro.
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| 30. | During the Triassic, the Mesozoic era began.
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