Kelheim limestone
The Kelheimer Kalkstein , also called Auerkalkstein , is a limestone . Its occurrence is in the Altmühltal in Lower Bavaria, west of Kelheim an der Donau near Oberau . This limestone originated in the Upper Jura ( Malm ).
geology
The Kelheim limestone, a sedimentary rock , was formed 145–150 million years ago in the uppermost Malm Delta. The Oberau quarry is located in the Weltenburg reef mass between the Paintener Wanne to the north, the southern and eastern Kelheimer Wanne, and the Hienheimer Wanne to the west and Altessing.
Rock description
This reef limestone is ivory to cream-colored, less often reddish, and was deposited unstaffed. It is made up of fragments of reef and fossil remains, algae, shells and sponges.
The stone can be polished, typically ground and bush hammered surfaces are used. The density is around 2.5 kg / dm³, the compressive strength is 100 N / mm², the flexural strength is 10 N / mm². Au limestone is also frost-resistant as a floor covering.
In addition to the Kelheim limestone, three other limestones are quarried along the Altmühl in the southern Franconian Jura, all of which have been used as stone in architecture for a long time : the Wachenzeller dolomite , the Jura marble and the Solnhofen limestone .
use
It was mainly used as a solid building block as well as for floor and wall panels, tombs and sculptures. It can be polished, sanded and sawed. The polish is not permanent outside.
It is partly extracted in an underground quarry.
There is evidence that bricks from the Kelheim area were found in the Roman fort in Regensburg.
This natural stone is used in a number of large historical buildings in Munich such as the Hall of Fame , the Technical University , the Monopteros , the National Theater , the Nymphenburg Palace , the Siegestor and the Feldherrnhalle . It was also used at St. Stephen's Cathedral in Vienna, the Liberation Hall near Kelheim and the Walhalla near Regensburg. He was in the era of National Socialism a frequently built-up stone.
More recently, the Schönhauser-Allee-Arcaden in Berlin , the Beck department store in Munich and the Holiday Inn in Düsseldorf have been clad with Kelheimer Kalkstein .
- Historic buildings made of Kelheim limestone
Hall of Liberation Kelheim
Hall of Fame in Munich with Bavaria in front of it in Munich
Monopteros dome in the English Garden in Munich
Stone bench in the English Garden in Munich
Walhalla near Regensburg
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 evidence
- ↑ Thomas Grunenberg: Sediment petrographic aspects of a reef limestone using the example of the Kelheim Auerkalk. P. 1 (PDF; 122 kB). Retrieved August 20, 2010
- ↑ Kelheimer Auerkalk - technical data , Industrievereinigung Altmühltaler Kalksteine eV
- ^ Quarrying the Kelheim limestone in the underground quarry . Retrieved August 20, 2010
- ↑ Information on kelheimer-naturstein.de . Retrieved August 20, 2010