Figure 4-1. A: Horizontal stylolite in a highly compacted Devonian bioclastic grainstone. B: Higher-magnification image of top of large column at right in A, showing either the remant of a less pronounced stylolite consumed by the large one or a less pronounced stylolite that has formed within a column that was once longer than its present length.

      Images were scanned directly from sample. Alpena, Michigan; Sample ME70-16b. Sample collected by L. Bruce Railsback.

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