Worzeldorfer sandstone
The Worzeldorfer sandstone , even Nuremberg quartzite , Worzeldorfer quartzite or Wendelsteiner quartzite called, is in Worzeldorf south of Nuremberg in the Lorenz Imperial forest broken. It is not a quartzite in the actual sense, but a pebbly bound sandstone ("cement quartzite"). The Worzeldorfer sandstone belongs to the Löwenstein Formation (formerly also Burgsandstein) of the Middle Keuper . The Löwenstein Formation is now correlated with the international norium level.
Mineralogy and color
This sandstone is coarse sand, gray to reddish brown. This rock mostly shows a streaky structure that alternates between light and reddish. Worzeldorfer sandstone has large pores and is quartz-bound. Clay deposits sometimes occur. It consists of 44 percent quartz , 42 percent alkali feldspar , 10 percent rock fragments and accessories ( rutile , tourmaline , zircon and ore) less than 2 percent. The grain size ranges from 0.5 to 2 millimeters.
use
Worzeldorfer sandstone has been quarried in several quarries since the Middle Ages. The deposits are of good building block quality and were transported from the numerous quarries to the ports of Worzeldorf and Wendelstein. There they were loaded onto barges for further transport. Later, the ashlar could be shipped on a larger scale in the Ludwig-Danube-Main Canal, which was built between 1836 and 1846 . The city of Nuremberg regulated quarry operations in the Middle Ages with a mountain regime. This sandstone was mainly used for solid buildings, bricks, window and door frames as well as stairs , facades and in stone carving . The Worzeldorfer sandstone is a well weather-resistant sandstone and only after a long installation time does it come to minor dissolution and sanding.
Buildings made from this sandstone are the Nuremberg Castle as well as fortifications and numerous historical buildings in Nuremberg, and the grave of Albrecht Dürer and Veit Stoss on the Johannisfriedhof in Nuremberg is made of Worzeldorfer sandstone. Newer buildings in Nuremberg are also clad with facade panels of this reddish sandstone, as are bridge structures on the motorways around Nuremberg.
.jpg)
See also
- List of sandstones
- Holsteinbruch near Worzeldorf
- Steinbrüchlein (Unterlangenlohe)
literature
- Wolf-Dieter Grimm: picture atlas of important monument rocks of the Federal Republic of Germany. Published by the Bavarian State Office for Monument Preservation, Lipp-Verlag, Munich 1990, ISBN 3-87490-535-7 .
Web links
Individual proof
- ^ Grimm: Monument Atlas of Important Monument Stones. Rock no.104 (see literature)
Coordinates: 49 ° 22 ′ 33.7 ″ N , 11 ° 6 ′ 20.7 ″ E