Mountain fresh

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Bergfrisch is the term used in miners' language and geological parlance to describe the condition of an unweathered rock or mineral immediately after it has been removed from an existing rock body.

term

It is irrelevant whether the material in question comes from a natural outcrop , a quarry or open pit or a mine. The term is primarily applied to rocks and minerals that change their appearance considerably or even undergo a chemical transformation under the influence of daylight, oxygen or air humidity or through loss of moisture (loss of "mountain moisture" ).

For example, the evaporite rock carnallitite is only stable for a relatively short period of time outside its natural rock compound, as it contains the extremely hygroscopic mineral carnallite , which dissolves because it dissolves in the water removed from the air. A mudstone , the more in mountain fresh plastically behaving may be extremely brittle in faster dehydration and to dust.

Quarries are therefore oriented to the north as far as possible so that the rock remains easier to extract and work on. Stonemasons use the term “freshly broken” or “moist” to describe the stone that was removed from a quarry immediately before processing . It can be machined with less effort and tool wear.

literature

  • Heinrich Veith: German mountain dictionary with evidence . Wilhelm Gottlieb Korn, Breslau 1871, p. 600 .
  • Moritz F. Gätzschmann: Collection of mining expressions . Craz & Gerlach (R. Münnich), Freiberg 1859, p. 96 .
  • Hans Murawski, Wilhelm Meyer: Geological dictionary . 10th, revised and expanded edition. Ferdinand Enke, Stuttgart 1998, ISBN 3-432-84100-0 , pp. 278 .
  • Collective of authors: Basic geological knowledge . Ed .: Horst Roschlau, Hans-Joachim Haberkorn. 2nd Edition. German publishing house for basic industry, Leipzig 1977, p. 199 .
  • Dierk Henningsen: Geology for civil engineers: An introduction . 3. Edition. Springer-Verlag, Berlin-Heidelberg 2002.
  • Carl Wilhelm Dempp: Doctrine of building materials, with regard to their occurrence in nature . Joseph Linhauer'sche Buchhandlung, Munich 1842.