Stratigraphic position of samples used to calculate the atelostomate spine accumulation rate (ASAR), including approximate age in Ma, spines per gram sediment (sp/g), the linear sedimentation rate (LSR) and dry bulk density (DBD).

For sets of samples, mean values for age and ASAR were calculated, and minima and maxima are given under remarks (comp. also “Material and Methods”). Cen./Turon.: Cenomanian/Turonian boundary interval, Coniac.: Coniacian, Santon.: Santonian, Campan.: Campanian, Maastricht.: Maastrichtian (see “Supplementary Information” for data of sets of samples).