Figure F31. Flaser texture produced by pressure-solution diagenesis of a partially bioturbated volcanic ash (Subunit IC; Oligocene; interval 192-1183A-17R-1, 120-135 cm). The highest concentrations of volcanic ash were concentrated into seams, whereas wispy microstylolites in more carbonate-rich intervals produce a nodular chalk texture.

Figure F31. Flaser texture produced by pressure-solution diagenesis of a partially bioturbated volcanic ash (Subunit IC; Oligocene; interval 192-1183A-17R-1, 120-135 cm). The highest concentrations of volcanic ash were concentrated into seams, whereas wispy microstylolites in more carbonate-rich intervals produce a nodular chalk texture.