| 11. | The Iberian Peninsula contains rocks of every geological period from the Ediacaran to the Alpine belt.
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| 12. | Peppercorn class A1s is named after a geological period and another after an insurance company ".
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| 13. | The names of formally defined geological periods and the rock layers corresponding to them are capitalized.
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| 14. | ""'Geosternbergia " "'is an extinct pteranodontid reptile from the Late Cretaceous geological period of North America.
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| 15. | The first fishes with jaws ( Gnathostomata ) appeared during the next geological period, the Ordovician.
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| 16. | It suggested that there are likely to have been at least two geological periods on Venus:
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| 17. | Some geologists assert that the Neogene cannot be clearly delineated from the modern geological period, the Quaternary.
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| 18. | Palaeontology is the science which deals with the life of past geological periods as known from fossil remains.
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| 19. | Formed during the volcanic activity of the Cretaceous geological period, one such west-facing cliff houses the Ellora Caves.
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| 20. | There are also three major groups of sedimentary rocks, layers of particles that settled in different geological periods.
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