Abstract
Lake Van is the largest soda lake in the world. It is a terminal lake, surrounded by mountains rising to 3500 m a.s.l. The Lake Van Basin is divided into three geological and morphological units: (1) the mostly metamorphic Bitlis Massif pertaining to the Bitlis suture zone to the south-west; (2) Mesozoic and Tertiary rocks (carbonates and volcanics) between the lake and the Turkish–Iranian border, and (3) volcanoes and volcanic products extending from the west to the north-east of the lake. The variety of the geomorphological landscapes around the lake is exceptionally high, with (i) some of the most impressive dormant volcanoes of Turkey; (ii) young (Late Pleistocene to recent) volcanic features such as a lake-filled caldera on top of the beheaded Nemrut Volcano, the solitary Süphan Volcano (the “Tushpa” God of the Urartians which dominates the lake by >1000 m), the fresh basaltic lava flows of the Tendürek Volcano, etc.; (iii) extensive lake terraces filling large valleys where they record impressive variations in lake level at least since the last 200 ka; (iv) travertine mounds associated with fault lines and river valleys; (v) karstic landscapes in the Bitlis Range and in the Tertiary limestones to the north-west, where they are covered by Nemrut ignimbrites and Süphan basalt and obsidian flows; (vi) glacial imprints on the summits of the Bitlis Range and of the Süphan; (vii) active landslides in marine sediments forming the slopes in the south-eastern basin; (viii) strong influences of tectonics on the relief, etc. Like in all Eastern Anatolia, high altitude pastures attract since millennia long-distance migrations of sheep herds seasonally switching between the southern plateaus in Syria and Iraq in winter, and Eastern Anatolia and the Caucasus in summer.
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Acknowledgements
The authors thank the “ANOVAN” Project (2006–2009), TUBITAK (ÇAYDAG 105Y125; SOBAG 105Y127), CNRS (ECLIPSE II and PICS), Bosphorus programme of French MAE and TUBITAK, University of Van, CNRS-LGP UMR 8591 and LSCE UMR. Ile-de-France Region, the Universities of Paris 1 and Paris-Diderot have contributed to the financing of the PhD Thesis of both authors.
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Akköprü, E., Christol, A. (2019). Lake Van. In: Kuzucuoğlu, C., Çiner, A., Kazancı, N. (eds) Landscapes and Landforms of Turkey. World Geomorphological Landscapes. Springer, Cham. https://doi.org/10.1007/978-3-030-03515-0_18
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