Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 11. 1983. (Budapest, 1983)
developed by Prof. B. GECZY for the most important sections (GÉCZY 1971a, 1971b, 1972, 1974, 1975, 1976). The simplified lithological columns of these precisely investigated sections (which are at the same time important brachiopod localities) are presented in Figs. 2 and 3. Some of the sections traversed the whole Pliensbachian (e.g. Lókút: 52, Bocskorhegy: 61, Bakonycsernye; 7 specimens). There are two localities with abundant brachiopods (Eplény: 680 specimens and Fenyves-kút: 658 specimens) but they represent only the Margaritatus Zone. The Kericser section has an outstanding importance because of its long stratigraphical interval and the quantity and quality of its brachiopod fauna. The 3953 specimens collected here take almost two-third of the whole material available from the Bakony Mts. ; and with its 77 species, Kericser can be ranged among the world' s richest Pliensbachian brachiopod localities. In the Bakony Mts. the Pliensbachian stage is represented by limestones (calcarenites and mudstones) without terrigenous elastics; these limestones can be grouped into four main types (see Figs. 2 and 3). 1. "Hierlatzkalk-type limestones . These are generally white to pink limestones (grainstones) composed of brachiopod, ammonoid (locally echinoderm) shells and skeletal debris, subordinately bivalves and gastropods occur too. This coquina is cemented by sparry calcite in at least two generation: a first, radiaxial fibrous rim-cement and a second, or further, mosaic spar. Red, brown or yellow void-filling micrites are very frequent in the form of geopetal structures; locally, the micrite matrix becomes dominant over the sparry cement. Depositional environment: top, flanks or feet of relatively shallow submarine highs ("seamounts"), or neptunian dykes where the slumped shell debris overcomes the lime mud in quantity and the rapid cementation prevents the infiltration of micrite (see also in GALÁCZ & VÖRÖS 1972). 2. Red, ferro-manganiferous biomicrites (packstones to mudstones). The shell debris is generally stained, coated or encrusted by ferro-manganese oxydes, the latter often forms nodules of several cms in diameter. The limestone is well-bedded with frequent hardgrounds. The sequences are strongly condensed, with unconformities where sometimes several stages are missing. Depositional environment: top of deeper submarine highs ("seamounts") or neptunian dykes. 3. Red, pink or grey, crinoidal, spiculitic or cherty limestones . These form practically continuous, relatively thick allodapic sequences composed of spiculitic biomicrite, crionidal biosparite and cherty beds sometimes alternating and interfingering with each other. Depositional environment: basin between submarine highs ("interseamount-basin"). 4. "Ammonitico rosso"-type, red nodular, ammonitic limestones (wackestones to mudstones). The degree of nodularity and the clay content are very variable. These limestones occur in continuous sequences sometimes intercalated with the above (No. 3) rock types. Depositional environment: pelagic part of basins, farther from submarine highs. It can be stated that the Pliensbachian brachiopods of the Bakony Mts. have been collected from variable sediments, from different environments suggesting very different water-depths and bottom-types. This serves a reliable basis for the determination of stratigraphical distribution of the brachiopod species, namely, in several cases we can be reassured that the distribution is real (stratigraphical) and not merely environmentally controlled. FAUNA The brachiopod species determined from the material at my disposal from the Pliensbachian of the Bakony Mts. are listed in Table 1^ The specimen number of the fauna is 6250 (1 November 1982); the indeterminable fragments amount to more than a thousand. The 101 species determined belong to 33 genera. Fourteen of the species and 7 of the genera are new; the new genera and one of the new species are described elsewhere (VÖRÖS 1983, in press). With its 101 species, the Bakony fauna is the richest Pliensbachian brachiopod fauna known from the Mediterranean province. It is obviously due to the uniquely detailed and voluminous collecting work done by Dr. J. KONDA and his co-workers.
