Six calcareous nannofossil abundance levels were recorded for each taxon; they are as follows:VA = very abundant (>50 specimens per field of view).A = abundant (11-50 specimens per field of view).C = common (1-10 specimens per field of view).F = few (0.1 to <1 specimens per field of view).R = rare (0.02 to <0.1 specimens per field of view).RR = very rare (<0.02 specimens per field of view).Preservation of nannofossils was recorded as good (G), moderate (M), poor (P), and very poor (VP).