| 41. | During the Devonian Period the thickened welt of crust formed by the Caledonian orogeny began to collapse.
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| 42. | In Morocco, most specimens survive from the distant Devonian period, between 345 and 405 million years ago.
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| 43. | The river flows over ground formed from Old Red Sandstone rocks laid down during the Devonian period.
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| 44. | In the Devonian period ( 416 359 Ma ) Gondwana and Siberia began to move towards Laurussia.
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| 45. | Sounds like a time when reptilians roamed the earth, back there with the Permian and Devonian periods.
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| 46. | Evolutionary innovation continued after the Devonian period.
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| 47. | He studied natural sciences at the universities of coral fauna of the Late Devonian period in Germany.
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| 48. | The Afon Dringarth flows across ground formed from the Old Red Sandstone laid down during the Devonian period.
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| 49. | The Devonian Period rocks are more common than Silurian Period rocks, making up two thirds of the county.
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| 50. | Plants with heterosporous life cycles using microspores and megaspores arose independently in several plant groups during the Devonian period.
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