Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 14. 1989. (Budapest, 1989)

CONCLUSIONS In the Vászoly section the Upper Anisian Avisianum Zone and the Lower Ladinian Reitzi Zone was proved by ammonoid biostratigraphy. The boundary between these two zones, which represents the Anisian/Ladinian boundary can be drawn at the base of Bed 14. The distribution of ammonoids within the Avisianum Zone follows a Stoppaniceras-Parakellnerites-Hun- garites succession. REFERENCES ASSERETO, R. (1969): Sul significato stratigrafico della "Zona ad Avisianus" del Trias Medio de lie Alpi. - Boll. Soc. Geol. Ital., 88: 123- 145. BITTNER, A. (1892): Was ist norisch? - Jb. k. k. geol. Reichsanst., 42(3): 387- 396. BRACK, P. and RIEBER, H. (1986): Stratigraphy and ammonoids of the lower Buchenstein Beds of the Brescian Prealps and Giudicarie and their significance for the Anisian/Ladinian boundary. - Eel. geol. Helv., 79(1): 181-225. KOVÁCS, S., NICORA, A., SZABÓ, I. and BALINI, M. (in press) : Conodont biostratigraphy of Anisian/Ladinian boundary sections in the Balaton Upland (Hungary) and in the Southern Alps (Italy). KRYSTYN, L. (1983): Das EpidaurusProfil (Griechenland) - ein Beitrag zur ConodontenStandardzonierung des tethyalen Ladin und Unterkarn. - Schriftenreihe Erdwiss. Komm. Österr. Akad. Wiss., 5: 231-258. MOJSISOVICS, E. (1882): Die Cephalopoden der mediterranen Triasprovinz. - Abh. k. k. geol. Reichsanst., 10: 1-322. RIEBER, H. (1973): Cephalopoden aus der Grenzbitumenzone (Mittlere Trias) des Monte San Giorgio (Kanton Tessin, Schweiz). - Schweiz. Pal. Abh., 93: 1-96. SILBERLING, N.J. and NICHOLS, K.M. (1982): Middle Triassic~Molluscan fossils of biostratigraphic significance from the Humboldt Range, Northwestern Nevada. - U. S.Geol. Surv. Prof. Paper., 120 7

: 1- 77. TOZER, E. T. (1981) : Triassic Ammonoidea: geographic and stratigraphie distribution. In: HOUSE, M.R. and SENIOR, J.R. (Eds): The Ammonoidea. - Syst. Assoc. Spec. Vol., 18_: 397-431. WANG YI-GANG (1983): Ammonoids from the Falang Formation (Ladinian-E. Carnian) of southwestern Guizhou, China. - Acta Palaeont. Sinica, 22 (2): 153- 162. ZAPFE, H. (1983): Das Forschungsprojekt "Triassic of the T^thys Realm" 'IGCP Proj. 4). Abschlussbericht. - Schriftenreihe Erdwiss. Komm. Österr. Akad. Wiss., 5: 7-16. Authors' address: Dr. Attila VÖRÖS József PÁLFY Paleontological Department Hungarian Natural History Museum H- 1088 Budapest Múzeum körút 14-16. HUNGARY