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GeoWord of the Day

The GeoWord of the Day is a free service of the American Geosciences Institute. All of the terms and definitions are from the Glossary of Geology, 5th Edition Revised.

Today's GeoWord

granularity (gran-u-lar'-i-ty)  The quality, state, or property of being granular; specif. one of the component factors of the texture of a crystalline rock, including both grain size and grain-size distribution. Granularity and grain relationships define textures, which, together with orientation, are included in the definition of fabric (in Sander's sense). Friedman (1965, p.647) used the term to refer to the "size and mutual relations of crystals" in a sedimentary rock such as an evaporite, a chemically deposited cement, or a recrystallized limestone or dolomite.

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