(Table 3) Abundance distribution of the 'clavate' subspecies of the genus Globigerinelloides and Pseudoschackoina saundersi in the upper part of the Cismon core

Frequency classes (washed samples), vr, very rare (1 specimen); r, rare (2-3 specimens); r/f, rare to few (4-5 specimens); f, few (6-8 specimens); f/c, few to common (9-12 specimens); c, common (13-16 specimens); c/a, common to abundant (17-20 specimens); a, abundant (21-25 specimens); va, very abundant (>25 specimens); x occurrence in thin section. - = absent. Depth, sediment is meters below well head.