of Esther van Assen
Miocene evolution of the
- Atlantic Gateways
Messinian Salinity Crisis makes an eminently valid case history to study
the role of marine gateways on circulation and sedimentation patterns.
this period, the Mediterranean - Atlantic gateways became restricted, were
closed, and re-opened again.
this caused major changes in paleocirculation and thus in depositional
environment in the Mediterranean. The advent of astronomically calibrated
Messinian sequences in both the Mediterranean Basin and Atlantic margin,
as well as numerical modelling studies on Mediterranean circulation patterns,
form a timely prerequisite for a detailed study of the marine gateways
of the Messinian.
at unraveling the temporal and spatial history of the Mediterranean - Atlantic
gateways during the late Miocene.
we establish high-resolution time frames for the sedimentary sequences
of the gateway basins with special emphasis on the timing of their restriction
we establish paleogeographic reconstructions which will aid in decyphering
the closure mechanism. The results will be fundamental input parameters
for the numerical modelling studies, and we expect that they will help
solving the controversies over the cause and mechanism of the Messinian
Salinity Crisis as well as over the geodynamic history of the Gibraltar
Publications of Esther van Assen
Van Assen, E., Kuiper,
K.F., Krijgsman, W., Sierro, F.J. and Barhoun, N. (2004). Messinian astrochronology
of the Melilla Basin: stepwise restriction of the Mediterranean-Atlantic
connection through Morocco, Palaeogeography, Palaeoclimatology, Palaeoecology,