Morphotectonic evolution of the Marmara Region: From the Canakkale Strait to the Istanbul Strait

Category Tectonic & Seismotectonic
Group GSI.IR
Location International Geological Congress,oslo 2008
Author Yilmaz, Yucel
Holding Date 11 October 2008

The Marmara region is situated at the intersection of the two very dominant tectonic regimes namely the North-South extensional system of the Aegean Region and the North Anatolian Transform Fault regime. In the region there are the following, distinctly different morphotectonic entities;
The Thrace- Kocaeli peneplain; this is recognized extensively on the Thrace and Istanbul areas.
The Balikesir- Bursa Plateau; which is the northerly continuation of the Western Anatolian extensional region where a number of East- West trending horsts and grabens have been developed.
The Marmara Sea Basin, which separates the Thrace Kocaeli peneplain and the Balikesir- Bursa Plateau; it is an unexpectedly deep basin having 3, more than 2 km. deep throughs.
The North Anatolian fault zone, which cuts the region in East — West direction and extends as a single branch.
The Armutlu high and the Ganos high; these highs bound the Marmara Sea basin at the two ends and extend as fault controlled narrow mountain ranges.
The Canakkale Strait (the Hellespont) and the Istanbul strait (the Bosporus) are two seaways which connect the Black Sea, through the Sea of Marmara to the Aegean- Mediterranean Sea. All of these Morphotectonic entities are young, formed after the Early Pliocene. Developments of some of these features are continuing under a high rate of deformation at the present time.
In this presentation development and interactions of these morphotectonic entities will be discussed in the light of new field, seismic, bathymetrical and other relevant data.