BSea                    Radiocarbon dates of marine shells from the
                        Bering Sea
adak                    Radiocarbon dates from Adak Island (Aleutians
                        Islands, Alaska)
coral                   Dates of corals from the South China Sea
deltar                  Calculation of Delta R Values
dr_df                   Compute Delta R values for a set of dates
dr_pair                 Calculate Delta R from a pair of dates
dr_plot                 Plot Delta R values from an object produced by
                        dr_df()
dr_shell                Delta R from the radiocarbon date of the marine
                        material with known collection date
