Author(s): Nese DUMAN, Ihsan ÃIÃEK
Lake Erçek is a closed basin located east of Lake Van basin. The lake lies at an altitude of 1803 m, covers an area of 106,2 km2, and has the mean depth of 18,45 m. As Lake Erçek is a closed basin lake, it is a soda lake similar to the nearby Lake Van. Described as a lava lake in previous studies, it is in fact a tectonic lake. Its basin started to develop in the Upper Pleistocene, and its depression was formed by Upper Pleistocene north-south faults. The examination and C14 dating of specimens obtained by drilling from lacustrine deposits and performed to identify level changes in Lake Erçek during the Upper PleistoceneHolocene have shown that the lake level did not rise too much above its current depression during the Holocene, but maintained its position. Erosion and speed of depositing in the region have continuously decreased ever since the early Holocene.
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