The ihsan Ketin NATO Advanced Study Institute on the Tectonic Evolution of the Tethyan Region was conceived in 1982 in Veszprem, Hungary, when three of the organizers (B. C. B. , L. H. R. and A. M. C. 9. ) had come together for a meeting on the tectonics of the Pannonian basin. All three of us had experience in the Tethyan belt and all three of us had been for some time deploring the lack of communication among workers of this immense orogenic belt. Much new work had been completed in such previously little-known areas as Turkey, Iran, Afghanistan, the People's Republic of China, the entire Himalayan region, as well as new work in the European parts of the chain. Also, ironically, parts of the belt had just been closed to field work for political reasons, so it seemed as if the time was right to sit back and consider what had been done so far. Because the Istanbul group had had an interest in the whole of the Tethyan belt and because that ancient city was more centrally locElted with excellent opportunities to see both Palaeo- and Neo-Tethyan rocks in a weekend excursion, we thought that Istanbul was a natural place for such a meeting, not mentioning its own considerable attractions for the would-be contributors. A happy coincidence was that Prof.

Zusammenfassung
Proceedings of the NATO Advanced Study Institute, Istanbul Technical University, Istanbul, Turkey, September 23-October 2, 1985 in honour of Prof. Dr. rer.nat. Ihsan Ketan

Inhalt
The Tethyside Orogenic System: An Introduction.- One Some Key Features of the Evolution of the Western Alps.- The Geometry of Crustal Shortening in the Western Alps.- Triassic and Jurassic Oceanic/Paraoceanic Belts in the Carpathian-Pannonian Region and its Surroundings.- Major Events of the Tectono-Sedimentary Evolution of the North Hungarian Paleo-Mesozoic: History of the Northwestern Termination of the Late Paleozoic Early Mesozoic Tethys.- Tectonic Units and Sutures in the Pontides, Northern Turkey.- An Example for the Tectonic Evolution of the Arabian Platform Margin (SE Anatolia) During Mesozoic and Some Criticisms of the Previously Suggested Models.- Timing of Opening of the Black Sea: Sedimentological Evidence from the Rhodope-Pontide Fragment.- Paleomagnetic Study of the Neogene Formations of the Aegean Area.- An Approach to the Origin of Young Volcanic Rocks of Western Turkey.- Tectonic Evolution of Paleotethys in the Caucasus Sector of the Mediterranean Belt: Basic Problems.- Palaeomagnetism of Upper Cretaceous Rocks from the Caucasus and its Implications for Tectonics.- Tethys Evolution in the Afghanistan-Pamir-Pakistan Region.- Tectonogenesis and Evolution of a Segment of the Cimmerides: The Volcano-Sedimentary Triassic of Aghdarband (Kopet-Dagh, North-East Iran).- Geology of the Baluchistan (Pakistan) Portion of the Southern Margin of the Tethys Sea.- The Himalayan Orogenic Segment.- Crustal Scale Thrusting and Continental Subduction During Himalayan Collision Tectonics on the NW Indian Plate.- The Tectonic Evolution of Qinghai-Tibet Plateau: A Review Chang Chen-Fa.- The Neo-Cimmerian Ophiolite Belt in Afghanistan and Tibet: Comparison and Evolution.- The Western End of the Tibetan Plateau.- Thrusting on the Tibetan Plateau Within the Last 5 Ma.-Tectonic Evolution of the Yangtze Tectonic Regime.- Mesozoic Suturing in the Ebuanan Alps and the Tectonic Assembly of South China.- The Shan Plateau and Western Burma: Mesozoic-Cenozoic Plate Boundaries and Correlations with Tibet.- The Palaeo-Tethyan Realm and Indosinian Orogenic System of Southeast Asia.- The Contribution of Vertebrate Palaeontology to the Geodynamic History of South East Asia.- Convergent-Plate Tectonics Viewed from the Indonesian Region.