Türkiye Jeoloji Bülteni

Delikkaya (Bakırcıoğlu, Yıldızeli, Sivas) Natural Travertine Bridge: A Geological Heritage to Preserve

Abstract: Travertine formations represent a significant component of geological heritage due to their scientific,educational, aesthetic, and geotourism value. Globally, such structures are protected for their rarity and ecologicalimportance. In Türkiye, travertine deposits are widespread, with 16 distinct localities identified in Sivas and itssurroundings. However, extensive quarrying activities threaten the preservation of these natural features, leading torapid depletion and irreversible destruction.The Delikkaya travertine field (Yıldızeli–Sivas) is of particular importance, hosting four ridge-type travertines.Geochronological data indicate that formation commenced approximately 15.1 (±0.5) ka in the Upper Pleistoceneand was completed 11.4 (±0.7) ka later, corresponding to the Greenlandian stage. The NNW–SSE-trending ridgetype travertine includes a natural travertine bridge, formed through stream erosion and block disintegration, whichis large enough to permit passage both above and below.Preservation of the Delikkaya Travertine Bridge and its surrounding travertine field is essential to safeguardgeological heritage and to promote regional geotourism potential. Registration of this site as a geosite would not only ensure its protection for future generations but also contribute to scientific research, educational development,and sustainable tourism initiatives.