Integrated biostratigraphic, magnetostratigraphic and chronostratigraphic correlations of the Late Miocene Lake Pannon deposits

Imre Magyar, Dana H. Geary, Miklós Lantos, Pál Müller, Mária Süto-Szentai

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Abstract

Due to the highly endemic nature of the Late Miocene Lake Pannon's aquatic biota, the stratigraphic correlation of the lake's sediments with the global chronostratigraphic system is dependent upon mammal biostratigraphy, magnetostratigraphy, and radio-isotopic age determinations. However, correlation of mammal localities and isotopically dated volcanic formations with the lacustrine sequence is possible only in a few instances, offering limited independent data for magnetostratigraphic interpretation. In this paper we construct a correlation chart that integrates biostratigraphy (dinoflagellates and mollusks) with the results of physical dating methods. The average time resolution of our biozones (excluding deep-water mollusk zones) is 1 Ma. There is a difference, however, in the amount of available data and consequently in the reliability of our correlations between the lower (older than approximately 9.5 Ma) and upper parts of the sedimentary sequence; the former is well-established, whereas a scarcity of radio-isotopic ages from the upper part of the sequence results in more uncertainty. In addition, a biostratigraphic subdivision of the last ca. 3 Ma interval of the lacustrine sequence is almost entirely lacking. The only opportunity for interbasinal biostratigraphic correlation within the lifetime of Lake Pannon is the Early Pontian migration event, when a great number of the Lake Pannon endemic species entered the Eastern Paratethys. However, due to the scarcity of chronological data from the Late Miocene of the respective basins, correlation of the Eastern Paratethyan Pontian Stage to the Lake Pannon deposits carriers at least a 1.3 Ma uncertainty.

Original languageEnglish
Pages (from-to)5-31
Number of pages27
JournalActa Geologica Hungarica
Volume42
Issue number1
Publication statusPublished - Jan 1 1999

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Keywords

  • Biostratigraphy
  • Chronostratigraphy
  • Extinct lakes
  • Lake Pannon
  • Magnetostratigraphy
  • Neogene
  • Pannonian basin
  • Paratethys

ASJC Scopus subject areas

  • Geology

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