Quartzite

The Quartzite from Glossen was formed by precipitation of silica solutions in Tertiary sand layers. The SiO2 content is more than 95%. This tertiary quartzite is found in 1 to 4 m thick banks and is covered by Pleistocene weathered loess. Extraction began in 1936. The material was broken in a rock crushing plant. The quartzite was used as a highly fire resistant lining for blast furnaces.