“…To prepare palynomorphs for microscopical study from a sample, the material is traditionally initially treated separately with concentrated HCl and HF. Important publications describing the traditional palynological preparatory procedure include Norem (1953Norem ( , 1956, Sittler (1955), Staplin et al (1960), Wilson & Goodman (1963), Hughes et al (1964), Lennie (1968), Higgins & Spinner (1969), Wilson (1971a), Barss & Williams (1973), Sarjeant (1974, Appendix A), Faegri & Iversen (1975), Doher (1980), Batten & Morrison (1983), Herngreen (1983), Evitt (1984), Phipps & Playford (1984), Johnson & Fredlund (1985), Farley (1988), Traverse (1988), Litwin & Traverse (1989), Aldridge (1990), Poulsen et al (1990), Moore et al (1991) and Batten (1999). Two of the most recent and comprehensive accounts of this topic were given by Wood et al (1996) and Green (2001, chapters 25 and 26).…”