boundary in the Central Paratethys corresponds to a major turnover in faunal
elements, triggered by strong restriction to the open ocean connections.
The aim of this project is to establish a detailed integrated magneto-biostratigraphic
correlation between sections in the South Carpathian foredeep of Romania
and recently drilled cores from the North Carpathian foredeep in Poland.
Dating the Badenian-Sarmatian
transition in two different domains allows the quantificaton of the potential
diachrony between the two regions. Detailed geochemical proxy records may
allow the reconstruction of the mode (instantaneous, gradual or stepwise)
of salinity increase and to evaluate the contribution of gateway change.
Badenian evaporites are commonly overlain by a relatively thick series
of deep marine to brackish siliciclastic deposits. Very good exposures
are found in the Carpathian foreland domain in Romania. In addition, long
drill cores through the lower Sarmatian and upper Badenian, reaching the
top of the evaporites, were recently obtained in south Poland by our colleagues
from Warsaw. We will sample the Badenian-Sarmatian sediments for integrated
magneto-bio-stratigraphy (dinoflagelates). The organic rich shales will
be studied for high-resolution proxy records (geochemical elements) that
may reveal the rates of salinity change and variations in connectivity
with the open ocean system.