Sedimentation diagrams paleogeotherms. Temperature history of a sediment as a function of postdepositional time; converted to the integrated value of temperature as a function of time. A plot of the time-temperature integral versus postdepositional time can be compared with the time-temperature integral for specific yields of a diagenetic reaction to deduce at what stage in its history a sediment would have accumulated sufficient time and thermal energy to accomplish a given extent of reaction.--Modified journal abstract.

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