Geomorphological, depositional, and foraminiferal indicators of late Quaternary tectonic uplift in lskenderun Bay, Turkey
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2006
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Анотація
lskenderun Bay is a major shallow embayment in the eastern part of the Mediterranean
Sea, where the African and Anatolian Plates converge. This tectonically active
basin was investigated for oceanographic, sedimentological, geochemical, and
foraminiferal parameters. On the basis of the data acquired, the distribution of living
and fossil foraminifera in 284 grab and 54 gravity core samples was determined, the
basin floor bathymetry of the bay constructed, radiocarbon ages of sediments and fossils
ascertained, and depositional environments reconstructed. It has been discovered
that for the last 13.5 k.y., water masses were stratified and sedimentation was discontinuous
within the basin, which is characterized by irregular sea bottom morphology.
The sedimentation rate was very slow, varying in time and space from 0 to 0.012
cm yr-1. The foraminiferal distributions were spatially varied and discontinuous and
indicate a reversal from deep to shallow marine conditions in the cores. These irregularities
were attribut'd to active tectonics in the bay and a major tectonic uplift of the
bay since the late Pleistocene.
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Ключові слова
lskenderun Bay, late Quaternary foraminifera, lithotypes, tectonics, sedimentation rate
Бібліографічний опис
Geological Society of America