Figure 8. Planktonic foraminiferal abundances. A. Intervals where G. crassaformis is a dominant component of the assemblage. B. High abundances of O. universa and G. bulloides suggest modern conditions, whereas increased abundances of G. ruber (pink) indicate warm water or enhanced preservation or both. Abundance index: 5 = very abundant, 4 = abundant, 3 = common, 2 = few, 1= rare, and 0 = barren.

Figure 8. Planktonic foraminiferal abundances. A. Intervals where G. crassaformis is a dominant component of the assemblage. B. High abundances of O. universa and G. bulloides suggest modern conditions, whereas increased abundances of G. ruber (pink) indicate warm water or enhanced preservation or both. Abundance index: 5 = very abundant, 4 = abundant, 3 = common, 2 = few, 1= rare, and 0 = barren.