In Maastrichtian, sedimentation processes were recovered only in some places. The beds were termed differently owing to the limestone facies and local changes of sedimentary environment.In the Trieste-Komen plateau, J u r k o v š e k et al. (1996a, Figs.6, 10) joined the shallow marine subtidal, intratidal and supratidal sediments from the Maastrichtian to Thanetian time interval into the Liburnia Formation. In the Trieste Karst, equivalent strata are termed the member of Monte Grisa (C u c c h i et al.,1989, Pl.1,2), which is further subdivided into the upper and lower intervals.
V maastrichtiju se je sedimentacija le redko kje obnovila, vendar so bile te plasti zaradi bolj ali manj lokalno pogojenih razlik v sedimentacijskem okolju različno poimenovane.Na Tržaško - komenski planoti so J u r k o v š e k in sodelavci (1996a, sl.6,10) plitvomorske podplimske, medplimske in nadplimske sedimente združili v Liburnijsko formacijo, na Tržaškem krasu pa imenujejo ekvivalentne plasti člen Monte Grisa (C u c c h i et al., 1989, tab.1,2), ki ga delijo na spodnji in zgornji interval.