Leopold Kober (21 September 1883 – 6 September 1970), an Austrian geologist, proposed a number of (subsequently largely discredited) theories of orogeny and coined the term kratogen to describe stable continental crust, which was later shortened to kraton by Hans Stille. Kober, developing geosyncline theory, posited that stable blocks known as forelands move toward each other forcing the sediments of the intervening geosynclinal region to move over the forelands and forming marginal mountain ranges known as Randketten, while leaving an intervening median mass known as the Zwischengebirge.
- "All this made a mockery of the then prevalent Kober-Stillean model of symmetric orogens and vast, rigid Zwischengebirge in between..." Briegel, U. & Xiao, W. (2001), Paradoxes in Geology, p. 187. Elsevier.
- Şengör, A.M.C. (2003). The Large-wavelength Deformations of the Lithosphere: Materials for a history of the evolution of though from the earliest times toi plate tectonics. Geological Society of America memoir. 196. p. 331.
- Linton, D. L. & Mosely, F. (1970), 'The Geological Ages', in the Cambridge Ancient History, vol. 1A., pp. 17–18. Cambridge: Cambridge University Press.