| 11. | Instead of being based on stratigraphy, these dates are defined chronometrically.
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| 12. | This leads to the second important detail, the stratigraphy.
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| 13. | Various layers of dumped material were identified, giving a confused stratigraphy.
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| 14. | Given a proper stratigraphy, chevrons can persist almost indefinitely.
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| 15. | Douglas also studied the stratigraphy of the Mississippian system in southern Alberta.
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| 16. | This concept gave rise to the field of seismic stratigraphy.
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| 17. | There is no complex stratigraphy observed at the excavated location.
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| 18. | Stratigraphy and Mineral-Chemical Evidence for Multiple Magma Injection.
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| 19. | The stratigraphy of the earthworks confirms the likelihood of a prehistoric origin.
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| 20. | From then up until to the 1960s she taught stratigraphy and palaeontology.
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