Biostratigraphy in a Late Neogene Caspian-Type Lacustrine Basin: Lake Pannon, Hungary
Published:January 01, 2012
Imre Magyar, Dana H. Geary, 2012. "Biostratigraphy in a Late Neogene Caspian-Type Lacustrine Basin: Lake Pannon, Hungary", Lacustrine Sandstone Reservoirs and Hydrocarbon Systems, Olive W. (Terry) Baganz, Yuval Bartov, Kevin M. Bohacs, Dag Nummedal
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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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Lacustrine Sandstone Reservoirs and Hydrocarbon Systems
Many publications on lacustrine systems concentrate on reconstructing paleo-environments, deciphering paleoclimate or estimating hydrocarbon source potential. This is the first memoir to give attention to describing the occurrence, distribution and character of sandstones in various lake settings. the volume is the outcome of a Hedberg Conference held in Baku, Azerbaijan in 2004. The memoir is divided into four sections beginning with a global overview, and followed by two sections covering lacustrine systems in compressional and extensional regimes. The volume concludes with a series of papers on modern lake regimes.