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Figure F2. Smear slide photomicrographs. A. Cuttings containing diatom-bearing silty clay, typical lithology of Unit I. B. Fragmented diatoms in a volcanic glass and clay-rich matrix. C. Silty sandstone and volcanic glass. D. Glauconite. E. Abundant woody fragments within weathered volcanic material beneath the first coalbeds. F. Well-preserved wood fragment. G. Bright green circular grains of siderite within organic-rich sediment. H. Siderite within coal layers. I. Glauconite in sandstone.

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