| 21. | On top of this basement rock, Permian and Mesozoic sedimentary and volcanic rocks were deposited.
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| 22. | This formation is not exposed in the park, though it does form its basement rock.
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| 23. | As such, the basement rock can become younger going closer to the edge of the continent.
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| 24. | These basement rocks were created during the late Mesozoic era, long before the Itcha Range formed.
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| 25. | These tuffs lie directly on the basement rocks.
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| 26. | The Lower Peninsula is dominated by a Gladwin County where the Precambrian basement rocks are deep.
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| 27. | Basement rock was formed during the Hercynian orogeny when a strong regional metamorphism affected the area.
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| 28. | This fate the Pi�gut-Pluviers granodiorite shares with many other crystalline basement rocks in the Massif Central.
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| 29. | This isotope signature may be the effect of assimilation of deeper basement rocks during magma formation.
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| 30. | Typically, the temperature in those vast regions of the accessible crystalline basement rock increases with depth.
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