Kenyte is a type of igneous rock. More specifically, it is a variety of porphyritic phonolite or trachyte with rhomb-shaped phenocrysts of anorthoclase with variable amounts of olivine and augite in a glassy matrix; the glass may be devitrified.
It was originally described and named by J. W. Gregory in 1900 for the occurrence on Mount Kenya.Roger Walter Le Maître, Igneous Rocks: A Classification and Glossary of Terms: Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks, Cambridge University Press; 2nd ed., 2002, p. 96 J. W. Gregory, The Geological History of Mount Kenya, The Quarterly journal of the Geological Society of London, Volume 56, 1900, pp. 219-220 Kenyte has also been reported from Mount Kilimanjaro (Tanzania) and Mount Erebus (Antarctica).Kyle, Philip R., ed., Volcanological and Environmental Studies of Mount Erebus, Antarctica, American Geophysical Union (December 1994), p. xi
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