Kenyte
Type of igneous rock
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.[1]
It was originally described and named by J. W. Gregory in 1900 for the occurrence on Mount Kenya.[2][3] Kenyte has also been reported from Mount Kilimanjaro (Tanzania) and Mount Erebus (Antarctica).[4]
References
- ^ "Mt. Kenya Volcano". Archived from the original on 26 March 2012. Retrieved 13 July 2011.
- ^ 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 ISBN 978-0-521-66215-4
- ^ J. W. Gregory, The Geological History of Mount Kenya, The Quarterly journal of the Geological Society of London, Volume 56, 1900, pp. 219-220
- ^ Kyle, Philip R., ed., Volcanological and Environmental Studies of Mount Erebus, Antarctica, American Geophysical Union (December 1994), p. xi ISBN 978-0-87590-875-5
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Types of rocks
- Adakite
- Andesite
- Alkali feldspar granite
- Anorthosite
- Aplite
- Basalt
- Basaltic trachyandesite
- Basanite
- Blairmorite
- Boninite
- Carbonatite
- Charnockite
- Dacite
- Diabase
- Diorite
- Dunite
- Essexite
- Foidolite
- Gabbro
- Granite
- Granodiorite
- Granophyre
- Harzburgite
- Hornblendite
- Hyaloclastite
- Icelandite
- Ignimbrite
- Ijolite
- Kimberlite
- Komatiite
- Lamproite
- Lamprophyre
- Latite
- Lherzolite
- Monzogranite
- Monzonite
- Nepheline syenite
- Nephelinite
- Norite
- Obsidian
- Pegmatite
- Peridotite
- Phonolite
- Phonotephrite
- Picrite
- Porphyry
- Pumice
- Pyroxenite
- Quartz diorite
- Quartz monzonite
- Quartzolite
- Rhyodacite
- Rhyolite
- Scoria
- Shonkinite
- Sovite
- Syenite
- Tachylyte
- Tephriphonolite
- Tephrite
- Tonalite
- Trachyandesite
- Trachybasalt
- Trachyte
- Troctolite
- Trondhjemite
- Tuff
- Websterite
- Wehrlite
- Argillite
- Arkose
- Banded iron formation
- Breccia
- Calcarenite
- Chalk
- Chert
- Claystone
- Coal
- Conglomerate
- Coquina
- Diamictite
- Diatomite
- Dolomite
- Evaporite
- Flint
- Geyserite
- Greywacke
- Gritstone
- Itacolumite
- Jaspillite
- Laterite
- Lignite
- Limestone
- Lumachelle
- Marl
- Mudstone
- Oil shale
- Oolite
- Phosphorite
- Sandstone
- Shale
- Siltstone
- Sylvinite
- Tillite
- Travertine
- Tufa
- Turbidite
- Varve
- Wackestone
- Adamellite
- Appinite
- Aphanite
- Borolanite
- Blue Granite
- Epidosite
- Felsite
- Flint
- Ganister
- Gossan
- Hyaloclastite
- Ijolite
- Jadeitite
- Jasperoid
- Kenyte
- Lapis lazuli
- Larvikite
- Litchfieldite
- Llanite
- Luxullianite
- Mangerite
- Novaculite
- Pietersite
- Pyrolite
- Rapakivi granite
- Rhomb porphyry
- Rodingite
- Shonkinite
- Taconite
- Tachylite
- Teschenite
- Theralite
- Unakite
- Variolite
- Wad
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