The Viséan (Carboniferous) sedimentary succession of the basinal Kulm facies (Rhenish Mountains) was investigated in
detail in order to achieve a high-resolution stratigraphic subdivision and correlation.  Additionally, the ranges of fossil
index taxa (arnmonoids), fossil marker beds, volcaniclastic horizons and sedimentary features (e.g. colour changes) were
integrated in the correlation.  As a result, a comprehensive database was compiled, which contains 190 stratigraphic events of the Viséan interval of this area.
   Several sections are almost completely composed of shales, which are regarded to represent a slow but constant basinal
 background sedimentation of the Kulm facies.  The thickness of lithological homogeneous sections thus indicates an
 approximately linear record of time and the average thicknesses of biozones and positions of stratigraphic events can
easily be calculated from the compiled database.  The result is an approximately time-Iinear biostratigraphic scale for the
Viséan Stage of the Kulm Basin.  Given a numerical length of the Viséan Stage of ca. 19 Ma, 190 stratigraphic events
give a mean resolution of 100 000 years.This is unique in Palaeozoic stratigraphy.