Porosity: Porosity Classification (definitions, criteria)
1979. "Porosity: Porosity Classification (definitions, criteria)", A Color Illustrated Guide To Constituents, Textures, Cements, and Porosities of Sandstones and Associated Rocks, Peter A. Scholle
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Intraparticle—rare, but possible within rock fragments, fossils, and other detrital grains.
Intercrystal-rare? Remnant primary porosity can be significant within clay cements.
Dissolution of detrital grains—common, especially removal of feldspars, carbonate rock fragments or fossils, or detrital sulphates.
Dissolution of authigenic cements—very common removal of calcite, dolomite, and siderite; significant removal of gypsum and/or anhydrite.
Dissolution of authigenic replacement minerals—common removal of carbonate or sulphate minerals.
Shrinkage—minor; can be significant in glauconitic sediments.
Fracturing—minor except locally.