Syenitové skály u Pocoucova

Syenitové skály u Pocoucova (Syenite Rocks near Pocoucov) is a small but geologically remarkable protected area located in the Třebíč municipality, in the Vysočina Region of the Czech Republic, at an elevation of 440 to 466 metres above sea level. The protected area currently covers about 1.49 hectares and has been under legal protection since 1950, making it one of the older nature reserves in the region.

What makes these rocks geologically special?

The site's main value lies in its distinctive rock formations, shaped by the weathering of grano-syenite, the rock that forms the so-called Třebíč massif. Over a long period of decomposition, harder, more resistant sections of rock survived as rounded boulders and blocks, while the surrounding material eroded away. The result is a scattering of striking, weathered rock formations visible across the terrain today — a textbook example of what geologists call spheroidal (boulder) weathering of granitoid rock.

Why are the rocks considered radioactive?

Syenite from the Třebíč area is notable for its elevated content of uranium and thorium, which, combined with a naturally high potassium content, gives the rock a measurable, if modest, level of natural radioactivity. This feature is well documented among geologists studying the Třebíč massif and is one of the reasons the site was designated a protected natural monument — preserving a distinctive example of this type of geological formation for future study and education.

How has the landscape around the rocks changed over time?

The land surrounding the rock formations was originally used as pasture dotted with scattered trees, an open landscape that kept the rock formations clearly visible. Once grazing stopped, natural succession took over, and the open pastureland gradually gave way to near-natural forest growth. This shift has enriched the area's biodiversity, but it has also partly obscured the visibility of the rocks themselves within the terrain.

Who manages the protected area?

Formal oversight of the site rests with the Regional Authority of the Vysočina Region (Krajský úřad Kraje Vysočina). Over successive updates to its protected status, the boundaries of the site have been adjusted; a later re-designation expanded the protected area to its current 1.49 hectares in order to better encompass the significant rock formations and the vegetation surrounding them.

Frequently asked questions

Where exactly are the Syenitové skály u Pocoucova located? The reserve lies near the village of Pocoucov, within the Třebíč municipality in the Vysočina Region, at an elevation of 440–466 metres above sea level.

Since when has the area been protected? Legal protection was established in 1950, with the boundaries of the protected area later adjusted.

Why are the rocks considered radioactive? Because of the elevated uranium, thorium, and potassium content in the syenite forming the Třebíč massif.

Can the site be reached on foot? Yes, it is a natural and touristic site accessible via walking routes around Třebíč, though the rock formations are now partly surrounded by forest growth.

What is the size of the reserve? Currently around 1.49 hectares.