. Bulletins of American paleontology. Text-figure 31 is similar to Text-figure 29 in shows the observed ranges of mud in seven of themarine biofacies. It is based on 54 samples typical ofa single biofacies and 19 samples transitional betweentwo biofacies. As before, transitional samples are in-cluded in the bars for both biofacies. The number ofanalyses from single biofacies and transitional samplesis shown below each bar. Unlike Text-figure 29, how-ever, the bars are arranged in the order of appearanceof the biofacies outward from the edge of the Ever-glades. Text-figures 29-31, studi
. Bulletins of American paleontology. Text-figure 31 is similar to Text-figure 29 in shows the observed ranges of mud in seven of themarine biofacies. It is based on 54 samples typical ofa single biofacies and 19 samples transitional betweentwo biofacies. As before, transitional samples are in-cluded in the bars for both biofacies. The number ofanalyses from single biofacies and transitional samplesis shown below each bar. Unlike Text-figure 29, how-ever, the bars are arranged in the order of appearanceof the biofacies outward from the edge of the Ever-glades. Text-figures 29-31, studied together, make clear theindependence of the biofacies from controls by anysingle environinental factor we studied. For example,the Parastarte Subfacies is confined to shallow water(Text-fig. 29), where mud is abundant (Text-fig. 30),so it follows that the mud content of the sediments inwhich the Parastarte Subfacies occurs is the highestof the seven plotted in Text-figure 31. In contrast, Tri- MoLLUSK Shells in Florida Bay: Shaw. Text-figure 25.—Most important taxa of the Rocky Shore Biofacies peloronta. C. Lilloi: colia Subfacies samples range from depths of less thanone foot, where mud is abundant, to nearly 20 feet( m). where mud is virtually absent. MUD IN CORES: We analyzed a number of coresamples for mud content, but they showed that oncesediment has been covered deeply enough to preventfurther agitation, most of the remaining porosity isfilled by mud sifting down from above. As a result,core samples contain more mud than sediments at thesediment-water interface. For this reason we only usedsediment analyses from the topmost sample of anycore for this study. To summarize, the available data show that there isassociation between mud and the marine biofacies butthat mud content alone does not control biofacies dis-tribution. SalinityTHE PROBLEMS: Salinity proved to be the hardestof the environmental factors to treat. First, there is the problem of measurement. A com
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