White Main sandstone
The White Main Sandstone , which is also called Semionotensandstein , Zeiler Sandstein or Coburger Bausandstein , is located in Upper Franconia near Bamberg in the Itztal and near Coburg in Bavaria. Today two types of sandstone of the White Main Sandstone are on the market, the Schönbrunn sandstone and the Neubrunner sandstone . The above-mentioned sandstones were formed in the Keuper and lie above the so-called bubble sandstone .
Occurrence and rock description
The gray-white to white and sometimes slightly reddish sandstone is fine-grained. In addition to quartz grains, it contains kaolinized feldspar and mica near the Main . Thanks to its mica inlays, it is easy to split. Its binders are clay, carbonatic or dolomitic . The individual rock banks are several meters thick.
Use and naming
Before the Second World War, the white sandstone was found in numerous quarries near Eltmann and Zeil am Main and near Coburg and in the Itztal in places such as Tretzendorf, Trossenfurt , Erbrach, Schmerl, Hof, Bug and Burgwindheim. The Coburg sandstone in particular was a relatively weather-resistant sandstone that was suitable for solid buildings, block steps and stone carving as well as for filigree and stone carving work. Today, sandstone is still quarried in some quarries such as Schönbrunn , Neubrunn , Breitbrunn and Schönbach . The stone quarries Schönbrunn and Neubrunn near Ebelsbach give their name to the stone types that deliver good building block qualities. The name Semionote sandstone comes from a fossilized original fish scale species found in this sandstone .
The White Main Sandstone was used at Bamberg Cathedral , Cologne Central Station, the Army Museum in Munich, the North German Lloyd building and the Cotton Exchange in Bremen.
See also
literature
- Otto Sickenberg: stones and earth. (Volcanic and metamorphic rocks, quartzites, sandstones, greywacke, conglomerates, limestone, dolomites, marl and slate) (= Geology and deposits of Lower Saxony. Vol. 5: The deposits of Lower Saxony and their management. Dept. 1 = Research on regional studies and folklore . Vol. 5, 1 = Writings of the Economic Society for the Study of Lower Saxony. NF Vol. 5, 1, ZDB -ID 132585-1 ). Dorn, Bremen-Horn 1951, p. 271 f.