Bubnoff unit

Physical unit
Unit name	Bubnoff unit
Unit symbol	${\displaystyle \mathrm {B} }$
Physical quantity (s)	speed
Formula symbol	${\displaystyle v}$
dimension	${\displaystyle {\mathsf {L^{1}T^{-1}}}}$
In SI units	${\displaystyle \mathrm {1\,B=1{\frac {mm}{1000a}}} }$
Named after	Serge von Bubnoff

The Bubnoff unit is a sometimes used unit of measurement for the (very low) "speed" of geological processes. It is named after the German-Russian geotectonist Serge von Bubnoff and is abbreviated with "B". A Bubnoff unit corresponds to one millimeter per 1000 years or one meter per million years .

Sample values

• Sedimentation rate of red deep sea clay: 10 B
• Sedimentation of shallow water limestone: approx. 100 B
• Descent rate of cratons: approx. 30 B, of geosynclines up to 250 B
• Mountain ascent: up to 10,000 B
• Eustatic sea level fluctuations: up to 30,000 B
• Distortion at plate boundaries: up to 50,000 B

literature

• Hans Murawski, Wilhelm Meyer: Geological dictionary . Springer DE, March 26, 2010, ISBN 978-3-8274-1810-4 , p. 24 (accessed on August 12, 2013).
• Günther Löffler, Herbert Voßmerbäumer: Living with our Earth: Contributions from the Faculty of Geosciences at the University of Würzburg; as part of the lecture series in the winter semester 2000/2001 . Königshausen & Neumann, 2002, ISBN 978-3-8260-2188-6 , p. 157 (accessed August 12, 2013).