“…In figure 3, the new unified zonation for the Western Interior Province In Canada, earlier zonations by Harker and Raasch (1958), Nelson (1960Nelson ( , 1961, Macqueen and Bamber (1968), and Macqueen, Bamber, and Mamet (1972) contributed to the new system. Descriptive work by Shimer (1926), Warren (1927), Kelly (1942), Harker and McLaren (1950), Crickmay (1955), Sutherland (1954Sutherland ( , 1958, Nelson (1959Nelson ( , 1960Nelson ( , 1962aNelson ( ,b, 1977, and Bamber (1966and Bamber ( , 1969 contributed to the taxonomic base for biostratigraphic analysis.…”