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Trosky ponds

Trosky valleys are traversed by two major rivers Žehrovka and Jordanka. Their tributaries form another side of the valley. All are developed in medium-grained, generally poorly massive quartz sandstones of the Teplice Formation in the overburden (in the end sections valleys and plains) are uncovered Cretacerous sandstone. They are a source of dissolved CaCO3, which is deducted in tufa bodies such Tachov waterfall. In the lower part of the valley were Jordanka quartz sandstone eroded down to underlying marl, which act as watered horizon. At these locations a number of bedding springs, which are nearest to the usual position of the springs valley. A distinctive feature is the wet floodplain width usually within 200 m, in no small part flooded pond system, and formed Holocene sandy runoff. Peaty meadow Vidlák is from the lower part of plains separated structural terrace. The effects of groundwater are developed transient peat bogs with some character.

Žehrovka valley is in its greatest part of the canyon with a predominance of relatively few rugged rock walls on both sides (like Plakánek valley). Scenery and rock towers, occur only rarely. Relief in areas adjacent to the flow Jordanka is more complex, with several more numerous groups of towers or spur in the top parts of sub-ridges. Side valleys may be topped rock stage with occasional or permanent waterfalls.

Especially around ponds Vidlák, skyscrapers and lumps is about a hundred towers in smaller groups. Rock towers above a pond Věžák create a picturesque group, dominated by hard rock water available.

GPS position

N 50° 30.906', E 15° 10.992'



Geopark UNESCO Český ráj
Jiří Vlasák