Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 18. 1996. (Budapest, 1996)

Fig. 4. Proportions of the main ammonoid morphogroups at the localities Mencshely, Vászoly and Felsőörs in the time of the Avisianum subzone. Legend for the pie-charts: black: "coronates", ruled: "sphaerocones", open: "others" Considering the vertical (temporal) changes, the proportion of "coronates" decreases, whereas the proportion of "sphaerocones" increases in time in the whole territory (both in the basins and on the pelagic plateaus). These percentages (without the "other forms") are shown in Tables V. and VI. These relationships and trends are demonstrated diagrammatically in Fig. 5. Here again, it is clearly seen that the proportion of "coronates", though decreases in time, is consistently higher on the pelagic plateaus than in the basins. Table IV. AVISIANUM SUB ZONE (465 specimens) basin pelagic plateau Table IV. AVISIANUM SUB Mencshely Felsőörs Vászoly "coronates" 5% 10% 17% "sphaerocones" 75 % 76% 69% others 20% 14% 14%