| 41. | The quartzite, which lies unconformably on gneissic basement rock, has been analyzed for traces of Precambrian life.
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| 42. | To the north of the N 065-striking fault the basement rocks consist of Plagioclase-bearing paragneisses.
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| 43. | I put ( an electric ) pickup on my violin, played in basement rock bands and got into improvising.
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| 44. | Many monoclines ( a type of gentle upward fault in the Precambrian basement rocks hidden well below any exposed formations.
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| 45. | The basement rocks have experienced metamorphism related to their original depth in the Earth's Variscan and Tertiary age.
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| 46. | All of the productive units are of Miocene age, and the underlying basement rocks date to the Jurassic period.
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| 47. | Modern geologists have documented four major deformational events that basement rocks and occurred around 1, 700 million years ago.
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| 48. | Hidden below a more than 6000 metre thick Mesozoic cover are probably more than 6000 m of Paleozoic basement rocks.
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| 49. | The Tonto Group units were deposited on an ancient erosion surface ( angular unconformity ) on the Vishnu Basement Rocks.
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| 50. | Much of the western two-thirds of the country consists of the Pliocene Pleistocene volcanics deposited on Precambrian basement rocks.
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