Figure 2-5. Cap (large red arrows) and sides (medium red arows) of one column of a vertical stylolite in an oolitic grainstone. Note truncated grains on along sides of columns; they are among the evidence that stylolites form by a process involving dissolution rather than ductile deformation. The oolitic grainstone was lithified both by intergranular compaction (note sutured contacts at balck arrows) and by cementation by calcite (C). More sutured intergranular contacts can be seen an another image from this sample. Also note that early intergranular compaction also caused buckling of outer cortices of ooids (small black arrows). .

      Mosaic of photomicrographs taken in plane-polarized light; field of view is 4.7 mm wide. Er Rachiddia, Morocco; Sample JM4-19; thin section S-3-136. Sample collected by L. Bruce Railsback and Joseph Walsh.

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