Quartz porphyry

The Quartz porphyry of Steinberg in Sornzig, – the lava type is also known as “Kemmlitz Porphyry“ – is a volcanic rock containing quartz and feldspar crystals dispersed in a dense matrix. The hard rock has been used for construction purposes since the Middle Ages, for example for building Marienthal Abbey and the abbey wall.

Text: Günther Schwerdtner (Heimatverein Mogelin)