Fragmenta Minerologica et Palaeontologica

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Author(s): Vörös, A.
Title: Environmental distribution and bathymetric significance of Middle Triassic ammonoid faunas from the Balaton Highland (Hungary)
Year: 1996
Volume: 18
Pages: 5-17.

Abstract: Large ammonoid faunas (more than two thousand specimens) have been collected from six sections of the Balaton Highland, encompassing the uppermost Anisian to Early Ladinian interval. Paleogeographically, three of the sections fall into basins, whereas other three have been on the top of pelagic plateaus. The environmental distribution of special morphogroups of ammonoids show that the proportion of "coronates" (strongly ornamented ceratitids) is consistently lower in the basins than in the pelagic plateaus, whereas "sphaerocones" (Ptychitidae + Arcestidae) show inverse relationship. During the studied interval, 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). This relationship is used to estimate water depth and changes in bathymetry.

Journal: Fragmenta Minerologica et Palaeontologica
Journal abbreviation:
ISSN: 0367-2697
Publisher: Magyar Természettudományi Múzeum, Budapest
Editor(s): Vörös, A. & Matskási, I.