Richard Lachmann

Richard Lachmann (born February 23, 1885 in Hamburg , † September 7, 1916 in the Carpathian Mountains ) was a German geologist. He was a private lecturer in geology at the University of Wroclaw .

Life

Richard Lachmann received his doctorate in Berlin in 1907 and was an assistant in Breslau from 1910, where he completed his habilitation in 1912 .

Cushion stone Richard Lachmann , family grave, Ohlsdorf cemetery, Hamburg

At the beginning of the 20th century, Lachmann was the main proponent of the now accepted theory that salt domes (which he calls eczema) are formed due to buoyancy and plastic fluidity (see halokinesis ). At that time, he had a scientific dispute about this with Hans Stille , who saw the salt domes in northern Germany as a result of tectonic lateral pressure within the framework of the saxonic folding he postulated and correctly recognized the arrangement along tectonic fault lines . Lachmann was supported by the chemist Svante Arrhenius and by the geologist W. Kirschmann, who, when evaluating deep boreholes in a salt dome in the Allertal fault zone near Magdeburg, demonstrated the migration of rock salt from the neighborhood. The dispute was a subject of the 1912 meeting of the German Geological Society in Greifswald and ended in a preliminary compromise around 1916 when both sides recognized that their respective theories were true.

With Arrhenius he also explained in 1912 the formation of hard salt from carnallite through metamorphosis .

He also dealt with tectonics, ore deposits, alpine geology, the Westphalian coal field, volcanism and stratigraphy.

In August 1912 he was one of the 34 founding members of the Paleontological Society .

Lachmann fell in 1916 as a private in a fighter regiment in the Carpathian Battles. On the Ohlsdorf cemetery in Hamburg, grid square Z 22 (northeast of Chapel 2), there is a bronze plate for him on the Lachmann family grave .

Fonts

• with Svante Arrhenius: The physico-chemical conditions in the formation of salt deposits, Geologische Rundschau , 3, 1912, 139–157
• About autoplastic (non-tectonic) form elements in the construction of the salt deposits in Northern Germany, Z. Deutsche Geolog. Ges., 62, 1910, 113-116
• The upwelling of salt: Geophysical studies on the structure of the salt masses in Northern Germany, Halle, W. Knapp 1911, 1912

literature

• Otfried Wagenbreth : History of Geology in Germany, Springer Spectrum 1999 (especially pp. 204–206, dispute about salt tectonics)

References and comments

1. ^ Obituary in Petermanns Mitteilungen October 1916 and 1917, Geologische Rundschau 1917
2. ↑ Kirschmann, The storage conditions of the upper Allertal between Morsleben and Walbeck, Z. Practical Geology 21, 1913, 1-27
3. ^ Palaeontological Journal 1, Issue 1, March 1914