Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 20. 2002. (Budapest, 2002)

28 HORVÁTH and microflora in the formation (BÁLDI 1984; BÁLDI HORVÁTH et ai 1984; NAGYMAROST 1983, MONOSTORI 1983, HORVÁTH 1980,1983). In the lower, hardly bedded part, the foraminifera assemblages consist of small tmuitellinids and cMoguembdinids. Gbbigeriria officinalis, TenuiteUa angustmmbilicata, Tenuitella gemma, "Gbbigeriria" postcretacea, Chibguembdina cubensis, Chibguembelina gracillima and Gbbammaliria barbacbensis are abundant. Bolivina nobilis, Bolivina elongata, Bolivina beyrkhi, Bolivina aeriariensiformis, Caucasina oligocaenica, Öjilostomella oolina, Albmorphina trigona, Trifarina budensis, Uvigerina gracilis, Asterigerinatafalcilocularis and Cibicidoidespseudoungerianus occur sporadically. Based upon the benthic species the bottom water was oxygen-deficient. The water mass was stratified as it is shown by dorninating surface cfwelling plariktonic forms and by the absence of typical intermediate and deep planktonic species. The age of the lower part of the Tard clay is Early Kiscellian, P18 foraminifera zone. Fossils are usually absent in the upper part of the Tard Formation, only some megaflora elements (leaves, grains) as well as fish remains occur. In this part of the Formation die foraminifera fauna is generally absent. There are few levels with characteristic mikrofauna with Ammomarginûina, Eratidus, Ammobaculites, Trochammina, and Gbbotextukria. These forms indicate special lagoonal environment with lower salt content. The Kiscell Clay — This Formation consists of grey calcareous clay and clayey marL It is non-stratified, biourrbated, with low CaCCb content. The exposures of the Kiscell Clay were the localities to Hantken's classic foraminifera investigations (HANTKEN 1868, 1871, 1875a, b). In the Kiscell Clay, the lower stratigraphical level can be characterised by Cassickdina vitaLisi from the GbUgenna-Gemeäides-Uvigerina assemblages. The more frequent taxa are: Subbotina eocaena, Subbotina angiporoides, Gemellides costatus, Gemellides ecKoenus, Uvigerina moravica, typical Cassickdina vitálisi, Hansenisca soldanii. The calcareous/agglutinated ratio is variable dep>ending on the quantity of the sandy sediment influx. In the upper part of the Kiscell Clay the agglutinated taxa are cbminant, the characteristic ones are Reticulopbragmium acutidorsatum, Tritaxia szabói, Karreriella, Ehrotbia, Haplophragmoides, Gaudryina, Vulvulina, Rhabdammina,Rhizammina^Mani^ (HORVÁTH 1998). Table 3 — Occurrences of HANTKEN's Textulariida and Miliolida species. M. HANTKEN'S name: S 1 8 1 1 g s §. ft) s •S s s G) c 1 <3 8 -<s a 1 g B c b a 3audryma irregularis to • S "a C ) Clavulina cylindrica 5 1 o a Triloculina porvaensis -a i a ? ^3 x fii Textilárut elongata Textilaria globosa 5 S! .e t3 s, s: •S "a 1 Valid name: S a S 5 s i R a g Ô 1 • 5 c g 1 5 -s s •S 1 s i s R -« a 13 '•3 •g a go 1 1 kJ v

o § • S x 3 ^ S vs •5 1 -S O g •S ï§ o o g Í ê K g o g a 1 1 a .g ~a 1 « 6« C o •S H S o o 60 •g _g R S cl • S "a Buda X X X X x X X X X St.J. restaurant X x Budakeszi X X X x X X Nagy-Kovácsi X X X X Üröm X X X X Pomáz X X Bogdány X X Sz.Iván X Solymár Esztergom X X X Tokod X X X \' Sárisáp X X Sz.Kereszt X X Puszta-Lökös X Recsk X X Kis-Hartyán X Zöldárok X x Szépvölgy X X x X X Kis-Svábhegy X X X X X Szápár X X X Várhegy X X X X Császárfürdő X X X X x Mogyorós X X X Porva X X X A Zugliget X X X Piszke X X Dorog X Nagy-Sáp X Hidegkút X X Bajót X X Szarkás X X Nyerges-Újfalu X Puszta-Nána X Csernye X Puszta-Gyón X Bakony-nána X The localities of the present studies Budapest, Újlak, former Holzspach brickyard — Kiscell Clay samples were collected from this clay pit in 1973. The clay was light grey coloured, with considerable amount of aleurit. It contained also some molluscan and fish remains. A borehole. [Kiscell (K)-l] was drilled here that crossed a Kiscell Clay and Tard Clay succession. The Kiscell Clay was 80 m and the Tard Clay was 13-m thick (BÁLDI et al. 1984). Budapest, Pusztaszeri street, road cut — The outcrop has recently become a protected geological object near the crossing of the Pusztaszeri út and the Zöldmáli út (Budapest). The locality was originally described by LŐRENTHEY (1911). Nowadays the road cut exposed a 12 m thick sequence with an alternation of incompact marl, limy marl and hard, compact allodapic marly limestone layers (BÁLDI et al. 1983). The thickness of the allodapic layers ranges from 10 to 350 mm. The graded bedding is usually invisible megascopically. The 0.5-0.6 mm sized microbioclasts are characteristic in thin section; the belong to red algae, œliinids, bryozoans, benthic foraminifers and thin shelled ostracods. The Buda Marl has important plariktonic foraminifers, as Subbotina linaperta, Subbotina. tripartita, Subbotina eocaena, Turborotalia ampliapertura, Gbborotalia increbescens, Globigerinita pera. Fragmenta Palaeontologica Hungarica 20, 2002