Pecka castle

Volcanics, sediments and silicified wood.

A body of pyroxene andesite of late Carboniferous, partly quarried, can be observed in an extensive shelf quarry in the town. Andesite is grey in colour, reddish-brown in weathered portions. Groundmass contains common big quartz crystals while fractures contain quartz, yellow fluorite, bronzite and other minerals. Ruins of a 14th-century castle are located on a hill above the town, formed by upper Carboniferous fluvial sediments of the Kumburk Formation – the so-called Štikov arcoses. Outcrops beneath the eastern ramparts of the castle are about 25 m in length and up to 7 m in height. They display conglomerate beds with large quart pebbles, evidencing the considerable transport ability of rivers of that time, especially in high-water periods. The Štikov arcoses contain relatively abundant silicified trunks of the genus Agathoxylon, belonging to Paleozoic conifers. One of these trunks, preserved in horizontal position, is visible in an outcrop in the castle cellar.


38_Pecka_foto1, author: V. Mencl


38_Pecka_foto2, author: V. Mencl


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