| 11. | This marine reptile lived in the Olenekian stage of the Early Triassic period.
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| 12. | This has been called a " treasure land for Triassic Period research ."
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| 13. | It is approximately 200 million years old, dating back to the Triassic Period.
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| 14. | In the mountain range, there is sandstone from the Triassic period which contains quartz.
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| 15. | They lived in the Early Jurassic and possibly Late Triassic periods along with dinosaurs.
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| 16. | The red sedimentary sandstone base of Partridge Island dates from the late Triassic period.
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| 17. | The cave was formed in the Triassic period and is about 710 m long.
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| 18. | Later, during the Triassic period, the region became the floor of a shallow sea.
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| 19. | Nevada's sea level continued to drop during the Triassic period.
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| 20. | They became extinct by the end of the Triassic period.
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