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Biostratigraphy in a Late Neogene Caspian-Type Lacustrine Basin: Lake Pannon, Hungary

By
Imre Magyar
Imre Magyar
MOL Hungarian Oil and Gas Plc
,
Budapest
,
Hungary
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Dana H. Geary
Dana H. Geary
Department of Geoscience, University of Wisconsin-Madison
,
Wisconsin
,
U.S.A.
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Published:
January 01, 2012

Abstract

The late Miocene-early Pliocene Lake Pannon was a large, long-lived, brackish lake that occupied the Pannonian Basin system in Central Europe. Traditionally, the stratigraphic subdivision of its several-kilometer-thick sediment pile has been based on fossils of endemic mollusks. For a long time, however, stratigraphers were misled by the unconventional architecture of the lacustrine-deltaic sequence. Due to progradation, the increasingly younger sediment packages have been deposited horizontally next to each other instead of forming a purely vertical succession. This pattern was fully recognized recently by seismic exploration of the basin. Newly interpreted biostratigraphy using anagenetically evolving mollusk lineages (in the littoral and sublittoral facies) and dinoflagellate algae (in the sublittoral and profundal facies) is consistent with this progradation model. The regional Lake Pannon stratigraphy is tentatively correlated with the geologic time scale through mammal stratigraphy, magnetostratigraphy, and radio-metric age measurements. This correlation suggests that temporal resolution of the biozones is on the order of 1 m.y.

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Contents

AAPG Memoir

Lacustrine Sandstone Reservoirs and Hydrocarbon Systems

Olive W. (Terry) Baganz
Olive W. (Terry) Baganz
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Yuval Bartov
Yuval Bartov
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Kevin M. Bohacs
Kevin M. Bohacs
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Dag Nummedal
Dag Nummedal
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American Association of Petroleum Geologists
Volume
95
ISBN electronic:
9781629810096
Publication date:
January 01, 2012

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