270
ATLANTIC
OCEAN
~
.
-. . . . ... ,..
,48 GLOBIGERIWITHEKA INDEX
33 TUR80ROTAUA I'(lMEROU
• .J}-I
P.P. Agterberg . P.M. Gradstein
t •• .,
o
ATLANTIC
OCEAN
...
>DO
79 GLOBIGERIWI TRIPARTJTA
ATLANTIC
OCEAN
41 Pl.ECTOFRONDICULARIA SP'
Fig.3 Palaeogeographical distribution patterns obtained by logistic regression (Modell) of
presence/absence data for two planktonic Foraminifera (148 Globigerinatheka index, and
79 Globigerina tripartita) and two benthonics (33 Turborotalia pomeroli and 41 Plectofrondicularia Sp. 1) in data set of 36 wells from Bonham-Carter et a1. (1986). Presence of taxa in
wells is marked by large circles. Symbols represent probabilities classified as 0 (0.00-0.05),
+ (0.05-0.20) or * (0.20-1.00)