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Figure 29. Diagenetic consitituents in upper Morrowan sandstones. A. Authigenic kaolinite (K) derived from dissolution of feldspars that partitions pore space. B. Kaolinite (K) “books” filling center of pores (in comparison to chlorite, which coats quartz grains). C. Bioclast filled with intraparticle glauconite (G). D. Thermal dolomite (D) with sparry calcite cement.