Quantitative Stratigraphy, Splining and Geologic Time Scales - Geomathematics: Theoretical Foundations, Applications and Future Developments - page 318

Fig. 9.7 Original stratigraphic information for three sections (F-H) of Sullivan database with
stratigraphic correlation based on nannoplankton faunizones according to Sullivan ( 1965 ).
Table 9.4 contains information on distribution of nine taxa in core samples (Source: Media
Agua Creek section (Source: Agterberg 1990 , Fig. 4.3)

the binomial frequency distribution model. Figure 9.8 shows the difference between
1 and the cumulative probability P ( k , n ) that an event occurs k times above another
one in a sample of size n .If1

P ( k , n ) exceeds 0.95, the fraction k/n is non-random
in that it is greater than 0.5 with a probability of at least 95 %. Only six of nine pairs