Fig. 7From: Standardisation, calibration and correlation of the Kübler-index and the vitrinite/bituminite reflectance: an inter-laboratory and field related studyComparison of the SW values given by Warr and Rice (1994) with values obtained for SW samples measured on a Kisch-Frey-Kübler calibrated XRD devise at the laboratories of Basel and Frankfurt. The CIS anchizone shows larger IC values than the KI anchizone. See discussion in the textBack to article page