Serge von Bubnoff

Sergius Nikolajewitsch von Bubnoff (15 July 1888 in Saint Petersburg – 16 November 1957 in Berlin) was a geologist and geotechnical engineer with Germano-Baltic ancestry who made important contributions to the rebuilding of geological research in East Germany after World War II. Starting in 1922, he was a professor at the University of Breslau. In 1929 he became a professor at the University of Greifswald and in 1950, he started his professorship at the Humboldt-University of Berlin. The Bubnoff unit, which is the unit of measure for the speed of geological processes, is named after him. Provided by Wikipedia