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Marine carbonate systems in the Sarmatian (Middle Miocene) of the Central Paratethys: the Zsámbék Basin of Hungary
Author(s) -
CORNÉE JEANJACQUES,
MOISSETTE PIERRE,
SAINT MARTIN JEANPAUL,
KÁZMÉR MIKLÓS,
TÓTH EMŐKE,
GÖRÖG ÁGNES,
DULAI ALFRÉD,
MÜLLER PÁL
Publication year - 2009
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.2009.01055.x
Subject(s) - geology , subaerial , paleontology , ostracod , carbonate , structural basin , sedimentary rock , carbonate platform , evaporite , geochemistry , facies , materials science , metallurgy
The study of eight stratigraphic sections at the margin of the semi‐enclosed Zsámbék Basin (Hungary) allows the sedimentary anatomy of oolitic–bioclastic systems in the Sarmatian of the Central Paratethys to be reconstructed. The mollusc, foraminiferal and ostracod associations indicate that the carbonate systems are Latest Badenian to Late Sarmatian in age. The Lower–Upper Sarmatian deposits are organized in superimposed subaqueous dunes prograding towards the basin on a low‐angle ramp. During the Late Sarmatian, the ramp underwent subaerial erosion linked to a moderate relative fall in sea‐level. Lagoonal deposits were later formed and microbial–nubeculariid–bryozoan–serpulid buildups were emplaced. The ‘abnormal’ marine conditions of the Sarmatian, conducive to the development of a poorly diversified flora and fauna and dominant non‐skeletal grains, are linked to fluctuating salinities, mesotrophic to eutrophic conditions and perhaps high alkalinity.