wood was bought in Truchtelfingen and used by Lautlingen miners at the Hörnle area. In Oberdigisheim Geppert in 1738 SHW-Ludwigsthal produced iron ore. From an old 3.5 km mine in an ooidal iron ore seam (Doggererzflöz) in Weilheim is wood in the Tuttlinger Fruchtkasten. Steel was produced in Tuttlingen by the Schwäbische Hüttenwerke in Ludwigstal, which produces now iron brakes. In Meßstetten-Michelfeld sand was found in an old arm of Danube. Christian Kiesinger (1876–1969) father of Kurt Georg Kiesinger had a factory. Ooidal iron ore (Bohnerz aus Eisenroggenstein) was found. After the Franco-Prussian War the mining was stopped. In Germany coal mining stopped 2018. black stone was mined for Operation Desert (German fuel project). Black coal is mined from the Posidonia Shale. Jet work (to make black jewellery which was very fashionable), was called Beinschnitzen. References External links https://www.br.de/br-fernsehen/sendungen/traumpfade/wegdesbuches-104.html Tübingen (region) Districts of Baden-Württemberg