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We analyze electron microscope X-ray spec- troscopy data of recent supratidal marine sediments. Sta- tistical measures are used to characterize the distribution of silicon and calcium in different layers of the sediments. We also use cluster analysis and symbolic dynamics to filter mea- surement noise and to classify different density regions. This allows to calculate characteristic patch sizes which reflect the sizes of individual clastic grains and the corresponding pore sizes. Silicon indicates the independent processes in the sed- imentation history of certain grains. Calcium is capable to monitor intrinsic early diagenetic processes of biogeochemi- cal calcium mineralization of primary organic matter as doc- umented in more organized distributions with higher cluster- ing.

Statistical measures of distribution patterns of silicon and calcium in marine sedimentary layers