Paratethys was a
epicontinental sea, stretching from Germany to China at the beginning
the Oligocene, that progressively retreated by a complex combination of
basin infill, glacio-eustatic sea-level lowering and tectonic uplift to
its present-day remnants: Black Sea, Caspian Sea and Aral Lake.
In this project,
focus on the late Miocene to Pleistocene when progressive sea retreat
variations in interbasinal connectivity generated extreme environmental
changes in the Paratethys domain:
will use high-resolution geochronology together with integrated
and paleomagnetism to unravel internal (geodynamics, tectonic uplift)
external (climate, glacio-eustatic sea-level change) forcing factors
to resolve the effects of Paratethys restriction (regional climate
biotic crises, aridification).
for key sections in Azerbaijan, was a first step.We found there that
boundary between uppermost Productive Series and the Akchagylian
stages, as observed in the Lokbatan section, has in the most likely
an age of 2.5 Ma, which is radically different from the existing age.
younger regional stages, the Apsheronian and the Bakunian, yield ages
their lower boundaries of older than 1.8 Ma, and 0.88 Ma, respectively.
time scales in the Paratethys ... click for more.
flooding at the
Maeotian-Pontian boundary (6 Ma), resulting in increased
connectivity, followed by desiccation features during the Messinian
Crisis (MSC) interval (5.6-5.3 Ma)
of the Caspian
basin, transforming open marine environments into lacustrine deltaic
and leading to alternating phases of desiccation and flooding.
in the Pleistocene, suggesting temporary connections between Paratethys
and Arctic Ocean.
We will first
a detailed chronologic framework for the Mio-Pliocene successions of
Black Sea and Caspian basins, which will consequently be used to
the tectonic and climatic changes that seriously affected the Eastern
region. Such multi-disciplinary approach is the only way to attain a
system view on Paratethys evolution.
Miocene Paratethys and planned transects to be studied in this project
section (Azerbaijan, near Baku)
Publications of Chris van Baak
- Chang, L., Vasiliev, I., Van Baak,
C.G.C., Krijgsman, W., Dekkers, M.J., Roberts, A.P. (2014).
Identification and environmental interpretation of diagenetic and
biogenic greigitein sediments: A lesson from the Messinian Black
Sea, Geochemistry, Geophysics, Geosystems, 15, 3612–3627.
- Reichenbacher, B., Krijgsman, W., Lataster, Y., Pippèrr, M., van Baak,
C.G.C., Chang, L., Kälin, D., Jost, J., Doppler, G., Jung, D., Prieto,
J., Abdul Aziz, H., Böhme, M., Garnish, J., Kirscher, U., Bachtadse, V.
(2013). A new magnetostratigraphic framework for the Lower
Miocene (Burdigalian / Ottnangian, Karpatian) in the North Alpine
Foreland Basin. Swiss Journal of Geosciences 106, 309–334.
Baak, C.G.C., Vasiliev, I., Stoica, M ., Kuiper, K.F., Forte, A.M.,
Aliyeva, E., Krijgsman, W. (2013). A magnetostratigraphic time frame
for Plio-Pleistocene transgressions in the South Caspian Basin,
Azerbaijan, Global and Planetary
Change, 103, 119-134.