Archive for August 2010

Climate change during and after the LGM in Central Turkey

August 22, 2010

Dogan from Ankara University published a new paper in the Journal of Quaternary International about the fluvial responses of Kizilirmak terraces to Late Quaternary climatic changes. A numerical chronology was established by AMS dating of fluvial sediments and Ar–Ar dating of a basalt sample capping the youngest terrace (Late Pleistocene terrace), indicating that the main incision phase was completed at the end of the LGM (Last Glacial Maximum, ~21,000 years ago). It appears that the major climatic transition from the LGM to the Late Glacial gave rise to aggradation in the fluvial system, and this event seems to be consistent with the timing of the regression phase of pluvial lakes and the termination of paleoglacier advances in the high mountains of Anatolia. doi:10.1016/j.quaint.2009.08.004

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Bronze age vegetation in the Middle East

August 22, 2010

by George Perfors

Deckers and Pessin have published a paper in the Quaternary Research about the Bronze age vegetation changes in the Middle Euphrates and Upper Jazirah (Syria and Turkey) based on more than 51,000 charcoal fragments of more than 380 samples from nine Bronze Age sites. Human impacts first took place within the riverine forests, and followed by land clearing within the woodland steppe. Local wood supplies at that time were still available despite the increased deforestation. For details, doi:10.1016/j.yqres.2010.07.007

Geological history of western Turkey

August 22, 2010

A new study has been published in the Earth and Planetary Science Letters by van Hinsbergen et al. about the geological history of the western part of Turkey. They used African-Europe convergence amounts calculated from the Atlantic plate circuits and seismic tomography images from the west Anatolian mantle structure, and revealed the geological history since Cretaceous times in a context of convergence, subduction, collision and slab break-off. For further details please refer to  doi:10.1016/j.epsl.2010.07.024