The Folk classification, in geology, is a technical descriptive classification of sedimentary rocks devised by Robert L. Folk, an influential sedimentary petrologist and Professor Emeritus at the University of Texas. == Folk's sandstone (clastic) classification == Folk's philosophy is that the name of a rock must convey as much information as possible without being a complete description.
The Folk classification, in geology, is a technical descriptive classification of sedimentary rocks devised by Robert L. Folk, an influential sedimentary petrologist and Professor Emeritus at the University of Texas. == Folk's sandstone (clastic) classification == Folk's philosophy is that the name of a rock must convey as much information as possible without being a complete description.
Source: Wikipedia "Folk classification" · CC BY-SA 4.0
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