Central-west Turkey is a transition zone both tectonically and climatically between the quite different central and western regions of Anatolia. Central Anatolia represents the seismically quiet part of the otherwise highly active Turkey. On the other hand, this region has some of the lowest precipitation and highest evaporation ratios of Turkey. Conversely, west Anatolia is one of the most rapidly extending regions of the world and seismically very active. The climate is very different from the central part of Turkey and more humid. The zone between these two regions is also known geologically as the Isparta Angle. This reverse-V-shaped fold and thrust belt has several lake basins today, which have archived the geological and geomorphological history of this tectonic and climatic transition zone. The Beyşehir-Suğla basin is located on the eastern part of this zone. This NW–SE trending basin includes the largest natural freshwater lake of the Mediterranean region: Lake Beyşehir. Lakes Beyşehir and Suğla are located in this tectonic depression that discharge into an incised river gorge opening to the Konya closed basin. In order to shed light on the development of the Beyşehir-Suğla basin, our study was mainly conducted within the Neogene and Quaternary units of the region. Our structural results indicate that the depression was probably formed by a transtensional regime in the middle Miocene, which is controlled by extensional tectonics since the early Quaternary. Also, the current depression has mainly embodied the structures that are the products of these tectonic phases. According to our sedimentary data and palaeoecological interpretation of available palaeontological data, the Beyşehir-Suğla basin was developed initially under a humid and warm climate in the middle Miocene; then since the late Miocene-Pliocene it was controlled by a relatively more arid and, at times, humid climate more like the central Anatolian basins. Although the Beyşehir-Suğla basin is hydrologically connected to the Konya closed basin in central Anatolia, it was protected from arid climatic conditions for over millions of years as evidenced by the lack of evaporites in the studied basin and surrounding basins located in the interior part of the Isparta Angle. While the regional climate seems to have changed consistently with the geomorphic response to large-scale tectonics (i.e. orographic barrier development), the Beyşehir-Suğla basin seems to be protected from hydrological closure by the existence of karstic features in the surrounding carbonate basement rocks.

土耳其中西部地区是安纳托利亚完全不同的中西部地区之间的技术和气候过渡地区。安纳托利亚中部代表着原本非常活跃的土耳其的地震静区。另一方面，该地区的降雨量和土耳其的蒸发率最低。相反，安纳托利亚西部是世界上扩张最快的地区之一，地震活跃。这里的气候与土耳其中部地区截然不同，而且比较潮湿。这两个区域之间的区域在地质上也称为Isparta Angle。这种反向V形的褶皱和逆冲带今天已拥有多个湖盆，这些盆地已记录了该构造和气候过渡带的地质和地貌史。Beyşehir-Suğla盆地位于该区域的东部。这个西北向东南趋势的盆地包括地中海地区最大的天然淡水湖：贝西希尔湖。贝西希尔（Beyşehir）湖和苏格拉（Suğla）湖位于该构造凹陷中，并排入通往科尼亚（Konya）封闭盆地的切开的河峡谷中。为了阐明贝西希尔-苏格拉盆地的发展，我们的研究主要在该地区的新近纪和第四纪单元进行。我们的结构结果表明，该凹陷可能是由中新世中期的张性构造形成的，该构造自第四纪初期以来就受到伸展构造的控制。同样，当前的低气压主要体现了这些构造相的产物。根据我们的沉积数据和可用的古生物学数据的古生态解释，Beyşehir-Suğla盆地最初是在中新世中期潮湿温暖的气候下发展的。然后自中新世-上新世晚期以来，它受到相对更干旱，有时甚至更潮湿的气候的控制，就像中部安那托利亚盆地一样。尽管Beyşehir-Suğla盆地在水文上与安纳托利亚中部的Konya封闭盆地相连，但经过数百万年的保护，免受干旱气候条件的影响，从所研究的盆地和位于内陆内部的周围盆地缺乏蒸发岩可以证明这一点。伊斯巴达角。尽管区域气候似乎随着对大地壳构造的地貌反应（即地形障碍发展）而发生了变化，