Rand coarse limestone
The rough limestone in the Hegau is a mussel agglomerate that was deposited under shallow marine conditions. Name derives from the beets . Due to the fossil record , the formation can be placed in the Ottnangium . The deposit is one of the most famous legacies of Molassemeeres in the area of Hegau. Both the Turritellenplatte at Ulm- Ermingen and the Tennikerfluh ( District Sissach , Basel-Country ) are analogous developments of Molassemeers.
Due to its special thermal conductivity , the coarse limestone was already used as a building material by the Romans . The rock was later used as a millstone because of its hardness and was mined in the Third Reich to build various buildings such as the Reich Chancellery . In the original area of the rock, the Herz-Jesu-Kirche in Singen is the most prominent building made of coarse limestone. Another property of the coarse limestone is its high nitrate resistance . In the Hegau it was therefore often used to build stables.
literature
- J. Baier: A contribution to the rough limestone in Hegau (SW Germany) . Geohistor. Leaves. Volume 25, 2015, pp. 37-49.
- J. Baier, A. Scherzinger, G. Schweigert: The rough limestone in the Hegau - coastal deposit of the Miocene Molasse Sea . Fossils. Volume 31, No. 4, 2014, pp. 56-60.
- A. Schreiner, H. Luterbacher: The molasse between Blumberg and Überlingen. Annual reports and communications of the Upper Rhine Geological Association, NF Volume 81, 1999, pp. 171–181.
- P. Allen, M. Mange-Rajetzky, M. Mater, P. Homewood: Dynamic paleogeography of the open burdigalian seaway, Swiss Molasse Basin. Eclogae Geologicae Helveticae. Volume 78, 1985, pp. 351-382.