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

Fig. 3. Sedimentary facies model for the Pliensbachian of the Bakony Mts., and some major features of the bivalve assemblages recognized, "f denotes the assemblage yielded by the fissure-filling limestone of the Margaritatus zone exposed in the former manganeseore mine at Eplény The highest diversity value is displayed by the Hierlatz limestone, whose fossil assemblages are interpreted as allochtonous (VÖRÖS 1986). The pattern shown by the numbers of species recorded from different lithologies is essentially similar to that of the diversity values. The Hierlatz limestone is the richest in species. The value for the assemblage of the above-mentioned fissure-filling of the former Eplény mine is significantly lower than the average and indicated separately again. SEDIMENTARY ENVIRONMENTS: 1 : Seamount top 2: Slope and foot 3: Inter-seamount basin CHARACTERISTIC L1THOLOGIES: A: red, Mn-Fe-oxyde rich biomicrites B: Hierlatz limestones C: Crinoidal, spiculitic or cherty limestones D: Ammonitico rosso limestones RELATIVE FREQUENCY OF BIVALVES IN THE BENTHIC ASSEMBLAGES (brachiopods + bivalves + gastropods) EVENNESS OF THE BIVALVE ASSEMBLAGES (D = 1/Ip

j

I

; p, is the relative frequency of the ah species) NUMBER OF SPECIES PROPORTION OF GUILDS AMONG BIVALVES: j-f T 4-j opibyssal suspension un ' shallow buriowmg •

others than ihn dominant guild Isa» te.tl NUMBER OF SPECIMENS