Cotta Sandstone

The Cottaer sandstone; also called the center box, is found both in the Elbe Valley, as well as in numerous side valleys. Its main deposit is located in the west of the Elbe sandstone, which stretches to the Bohemian border. He is named after the district Dohmaer Cotta, a mining area of the stone named. The Cottaer sandstone originated in the chalk, in the lower Turonian.

Formation and rock conditions

The colors of this Elbsandsteins may be whitish, gray, gray yellowish and brownish. In the south of Cottaer sandstone is medium grained and fine-grained in the north. To the place Cotta is the grain equal size from 0.1 to 0.22 mm and rarely up to 0.3 mm. The rock contains small mica mineral contents ( glauconite ), clayey and carbonaceous substances. The coal particles are deposited in recognizable veins. They resemble sometimes marble textures.

The technical values ​​of this natural stone vary greatly because the quartz grains of the sandstone are mainly Cottaer kieslig bound, but he has many unevenly distributed inclusions of the phyllosilicates illite and kaolinite.

Reduction

Mined the stone in Dohma (Great - cotta ), Bad Gottleuba- Berggießhübel in the districts God Leuba and Berggießhübel and Langenhennersdorf, further in Rottwerndorf, nine village and Lohmgrund in the south of Pirna; also in Gersdorf, Bahretal ( Ottendorf ) and Krippenbachtal. The degradation of the Elbe Sandstone Rocks is technically facilitated by the division of banks with varying strengths and clefts, since the gaps vertically and pending the benches at right angles about this. This makes it possible to break rectangular blanks. The thickness of the degradable sandstone banks changing from one -half to about 3 meters. The widths of mineralization of Cottaer sandstone varies from 50 to 80 meters.

Use

General Use

Earlier it was broken at the Langenhennersdorf, Berggießhübel and Gersdorf sandstone that was there grainier, not only from construction or stone sculptor stone, but also made ​​into millstones. Cottaer sandstone is used today (2008) for massive window and door frames, stone carvings and stone carvings profiled and used primarily for restoration, partly for new buildings.

Cultural Significance

The Cottaer sandstone has great cultural significance, because in the past elaborate and intricate stone carvings and rich in forms Bauzier were often nationally used from this natural stone and shaped, because the Cottaer sandstone is due to its ease of forming a popular stone the stone sculptor. For the sculptor works extremely fine-grained workpieces are selected. The Cotta Sandstone is to this day a commonly used stone sculptor.

The Cottaer sandstone movement was used as a building ornament in Dresden on armory and kennel, in Leipzig on Empire courthouse and on the stock market and at the Hamburg Rathaus in Berlin at the former Berlin Academy of Fine Arts, the Berlin City Palace for the architectural sculpture, at the Technical University Berlin, at the Pergamon Museum and the Tietz department store ( KaDeWe today ).

  • Kunsthistorisches using Cottaer stone

Zwinger

TU Berlin

University of the Arts Berlin, pheasant road

204557
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