Die Kuste, 81 (2014), 369-392 
374 
are available (Tab. 1). The grab samples were collected over a time span of app. 90 years; 
most of diem between 1960 und 1970. Fig. 2 depicts the sample locations together with 
the individual data sources. Grain size data were made available for die whole Nordi Sea 
area. The particle size distributions are stored as a sum curve in a logarithmic scale, ac 
cording to dieir resolution. The individual grain size fractions of die cumulative particle 
distribution are interpolated using linear or constrained cubic spline interpolation 
(Kruger 2004). 
Figure 2: Locations of grain size data in the North Sea.