Figure F29. Close-up photograph of boundary between Subunit IC (dolomitic coral boundstone/rudstone) and Subunit ID (dolomitic floatstone with red algae fragments; interval 194-1199A-15R-1, 47-61 cm). This boundary, which occurs at 121.9 mbsf, is characterized by thin red crust containing silt-sized quartz grains. This boundary may correspond to the middle/late Miocene boundary.

Figure F29. Close-up photograph of boundary between Subunit IC (dolomitic coral boundstone/rudstone) and Subunit ID (dolomitic floatstone with red algae fragments; interval 194-1199A-15R-1, 47-61 cm). This boundary, which occurs at 121.9 mbsf, is characterized by thin red crust containing silt-sized quartz grains. This boundary may correspond to the middle/late Miocene boundary.