Abstract
Randomness in the occurrence of lithologies in a cyclical succession is evaluated in terms of entropies which can be calculated from a Markov chain matrix. Two types of entropies are linked with every lithologic state; one is the entropy before deposition E (pre) and the other is that after deposition E (post),which together form an entropy set. The entropy sets for pebbly sandstone, sandstone, shale, and coal for the Karharbari coal measures, and sandstone, shale, carbonaceous shale, and coal for the Barakar coal measures were plotted separately and compared with Hattori's idealized plots. These coal measures probably were essentially of symmetrical cyclical pattern (Type-B)of Hattori. The entropy of the whole sedimentation unit readily fits under the broad framework of fluvial cycles.
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Khan, Z.A., Casshyap, S.M. Entropy in Markov analysis of late paleozoic cyclical coal measures of East Bokaro basin, Bihar, India. Mathematical Geology 13, 153–162 (1981). https://doi.org/10.1007/BF01031391
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DOI: https://doi.org/10.1007/BF01031391