Figure 1-7. Sutured ingranular contact (large red arrow) between an echinoderm fragment (E) and bryozoan fragment (B) in a Mississippian bioclastic grainstone, The echinoderm fragment is partly surrounded by calcite cement (C) that is syntaxial with the echinoderm grain. Such cement commonly precludes intergranular compaction, but the calcite cement here seems to have formed late in this rock's diagenetic history. That notion is supported by evidence at upper left that the calcite cement (C) postdates coarse dolomite cement (D). Other evidence of intergranular compaction is a sutured contact between bryozoan pieces (small red arrow) and broken bryozoan pieces (black arrow).

      Photomicrograph was taken in plane-polarized light; field of view is 2.4 mm wide. Scottsville, Kentucky, U.S.A.; Sample ME16-4Fl; thin section S-1-120. Sample collected by L. Bruce Railsback.

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