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During a five-year period (1971–1976) 147 channel and 92 core samples representing 15 individual bituminous coal beds in Oklahoma were collected and characterized using megascopic petrographic terms. The average coal contains sparse (< 15 percent) to moderate (15 to 30 percent) and thin (
coal, samples, partings, megascopic, physical properties, vitrain, fusain, attritus
Coal geologist, Oklahoma Geological Survey, The University of Oklahoma, Norman, Okla.