| 11. | Basement rocks consist of Ordovician clastic sediments consisting of phyllite with some sandstone interbedding.
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| 12. | The break-up of Pangea resulted in the break-up of the Paleozoic metamorphic basement rock.
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| 13. | The basin is centered in Gladwin County where the Precambrian basement rocks are deep.
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| 14. | They are metamorphosed basement rocks from prior to the Miocene.
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| 15. | Other basement rocks are the sandstone-containing marine Devonian-Carboniferous Lila faults.
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| 16. | The Ravensthorpe region is underlain by basement rocks of the Albany-Fraser Orogen and Yilgarn Craton.
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| 17. | Lava from the western flank flowed over basement rocks and trachytes of the pre-explosive phase.
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| 18. | To the north of the N 065-striking fault the basement rocks consist of Plagioclase-bearing paragneisses.
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| 19. | The granitic basement rocks were of late Jurassic age.
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| 20. | The Patuxent is the basal unit of the Coastal Plain sedimentary formations and basement rocks.
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