Millstones made of mica slate
Millstones made of mica slate , with the peculiarity of embedded hard crystals (for example staurolite ) for these stones made of mica slate , were often found in the oldest layers of medieval Danish mills. Similar millstone finds are known from the Lower Austrian Kamptal , where the minerals of the garnet group stored in the mica schist formed the molars. The property of these millstones is that they do not have to be sharpened regularly, as others do, which creates the radial grooves.
Locations
- In central Jutland Vejerslev , this type of stone was discovered during the excavation of a watermill that operated between 1175 and 1230.
- The construction of Ødi's watermill, which received a millstone made of Norwegian mica in 1341 and operated for over 140 years, was rebuilt between 1485 and 1486 and is now in the Haderslev Museum, has been precisely determined .
- At the Hulpiberen watermill, not far from Hammelvej (Str. No 457) near Tovstrup in Jutland , the remains of Norwegian millstones were found during the excavation together with those made from Skåne sandstone and local stone types. The mill was west of Aarhus on Lyngsbygårds Å. ( 56 ° 10 ′ 8.3 ″ N , 9 ° 50 ′ 16.2 ″ E )
- An early medieval millstone quarry was found in the Lower Austrian town of Altenhof, the origin of which is assigned to a Slavic royal estate in the 9th century ( 48 ° 32 ′ 45.2 ″ N , 15 ° 41 ′ 30.4 ″ E )
literature
- Christian Fischer: Hulpiberen . In: Skalk . No. 5 , 1984, pp. 3 to 9 .
Web links
- Lise Andersen: Møllesten af norsk glimmerskifer. Retrieved September 19, 2009 (Danish).
- Herbert Brand: The mill quarry in ALTENHOF. Accessed July 7, 2016 (German).