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Besedice Rocks


Honeycombs creation Water is drawn up to the surface of sandstone where all pure water becomes evaporated, depositing silica and other salts on, and beneath, the sandstone surface. This continuous process forms a hardened crust. The immediate subsurface parts are depleted particularly in bonding material. Repeated drying and crystallization of salts and ice crystals causes breakdown of the surface crust. Sand grains from the poorly lithified subsurface part are falling out and hollows are being enlarged, thus creating an incipient honeycomb pit.

Continued loss of sand grains from the near-surface parts results in the gradual enlargement and deepening of the honeycomb pits.

The pits tend to grow from the surface to the depth, excavating the weakened subsurface part and progressively undermining the surrounding crusts. The enlarging honeycomb pits start to coalesce, leaving residual ribs and pedestals.

A new crusted surface starts to develop in the coherent sandstone exposed by the loss of the incoherent subsurface part. The final remnants of the old crusted surface are finally lost, and a new rind develops 2 to 3 cm beneath the original surface.

GPS position

N 50° 37.725', E 15° 12.000'



Geopark UNESCO Český ráj
Jiří Vlasák