ONCE MORE ON CLASSIFICATION OF OIL SHALES USING CLUSTER-ANALYSIS

On the basis of the results of the multivariate statistical analysis o f 56 oil shales and shale-like rocks using their 6 essential character istics these caustobioliths have been subdivided into three classes: l ipokerogenous shales originating mainly from the lipid. fraction of in itial organic material and characterized by a high yield of semicoking oil, kerogen basis, heterokerogenous shales containing organic matter thoroughly transformed by multi-stage metabolic processes and yieldin g little oil on low temperature pyrolysis and intermediate shales.