Glavni izbornik

Izdvojeni sadržaji

How it all began: travertine cave

Travertine cave behind the mill in the Bilušića buk travertine barrier is the longest travertine cave in Croatia.

Caves and pits are one of the phenomena of karst. These are underground hollows created in limestone sediments thanks to cracks which expanded over time due to the corrosion and erosion effects of water. There are about a hundred caves and pits along the Krka River, with 65 within the boundaries of Krka National Park. The longest caves are located at the Miljacka spring. Once they appeared, the caves and pits became hiding places and living areas for many animal species.

Hollowness and fissures are the main features of the rock of karst landscapes. This leads to the formation of numerous pits and caves. The karstification process is also responsible for the formation of the ornamentation within these structures. Under special conditions, it is possible that this process is reversed: where calcium carbonate is again secreted, and instead of wearing, the rock grows. That results in the formation of stalagmites and stalactites, as well as travertine (tufa), the fundamental phenomenon of Krka National Park.

Travertine cave behind the mill is situated on the right bank of the Krka River in the Bilušića buk travertine barrier, at an elevation of 198 m. It was created in fossil (dead) travertine. It is branching. This is the longest travertine cave in Croatia, 124 m in length. It has four entrances, one of which is closed with low gates, and one is found in the mill. The width of the channel does not exceed 2 m. It is ornamented with a variety of travertine ornaments of unusual form. The cave has a mixture of classical cave and travertine dripstones, and therefore is a suitable place for studying their origins. Air temperature is 9.3 °C and relative humidity 100 % (3 May, 2010).