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Folk's carbonate rock classification details the relative proportions of allochems in the rock and the type of matrix. The classification scheme covers most common carbonate rocks, however the more inclusive although less precise alternative, Dunham classification, may be preferred in some instances. Folk classification consists of one or two ...
His book Petrology of Sedimentary Rocks, based on his course notes for graduate students, first appeared in 1957, went through 6 editions, and was revised periodically until 1980. [ 1 ] In 1973 Robert Folk, with his wife and daughter, spent six months in Italy, where he was a visiting professor at the University of Milan, upon the invitation of ...
Pantelidis, L (2009). "Rock slope stability assessment through rock mass classification systems", International Journal of Rock Mechanics and Mining Sciences, 46(2), (315–325). Palmstrom, A.; Broch, E. (2006). "Use and misuse of rock mass classification systems with particular reference to the Q-system". Tunnelling and Underground Space ...
The Dunham classification system for carbonate sedimentary rocks was originally devised by Robert J. Dunham (1924–1994) [1] in 1962, [2] and subsequently modified by Embry and Klovan in 1971 [3] to include coarse-grained limestones and sediments that had been organically bound at the time of deposition.
The rock mass rating (RMR) is a geomechanical classification system for rocks, developed by Z. T. Bieniawski between 1972 and 1973. [1] Since then it has undergone multiple modifications out of which, RMR89 [1] is commonly used. Recently RMR14 [2] has been proposed to improve the RMR performance by incorporating new experiences from tunnel ...
The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
QAPF diagram for classification of plutonic rocks. A QAPF diagram is a doubled-triangle plot diagram used to classify intrusive igneous rocks based on their mineralogy.The acronym QAPF stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)", which are the four mineral groups used for classification in a QAPF diagram.
The use of rock has had a huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years. [22] Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important ...