| 11. | Diatomaceous chert consists of beds and lenses of diatomite which were converted during diagenesis into dense, hard chert.
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| 12. | Early diagenesis in newly formed aquatic sediments is mediated by microorganisms using different electron acceptors as part of their metabolism.
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| 13. | An understanding of the geochemistry of connate fluids is important if the diagenesis of the rock is to be quantified.
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| 14. | During later diagenesis of the Navajo Sandstone while deeply buried, reducing fluids, likely hydrocarbons, dissolved these coatings.
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| 15. | It occurs at a temperature above diagenesis ( ~ 200 �C ) and below melting ( > 800 �C ).
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| 16. | Fungi and plants ( by their roots ) and various other organisms that live beneath the surface can also influence diagenesis.
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| 17. | While teeth are more resistant to chemical and physical changes over time, both are subject to post-depositional diagenesis.
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| 18. | Changes at or just beneath Earth's surface due to weathering and / or diagenesis are not classified as metamorphism.
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| 19. | Furthermore, once a sediment is deposited, it becomes subject to cementation through the various stages of diagenesis discussed below.
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| 20. | However, a fraction of siliceous oozes dissolve and reprecipitate as a result of diagenesis to form chert beds or nodules.
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