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  • Phonolite - Wikipedia
    Phonolite is an uncommon shallow intrusive or extrusive rock, of intermediate chemical composition between felsic and mafic, with texture ranging from aphanitic (fine-grained) to porphyritic (mixed fine- and coarse-grained)
  • Phonolite | Volcanic, Igneous, Intrusive | Britannica
    phonolite, any member of a group of extrusive igneous rocks (lavas) that are rich in nepheline and potash feldspar The typical phonolite is a fine-grained, compact igneous rock that splits into thin, tough plates which make a ringing sound when struck by a hammer, hence the rock’s name
  • Phonolite: Mineral information, data and localities.
    About Phonolite Hide Phonolitic rocks are fine-grained felsic igneous rocks lacking quartz, with felsics comprising 10-60% foids and alkali feldspar total feldspar >0 9
  • Tephritic phonolite - ALEX STREKEISEN
    Tephritic phonolite Phonolites: Phonolites are extrusive rocks that are essentially composed of alkali feldspar (Anorthoclase and Sanidine), mafic minerals such as alkali amphiboles, alkali pyroxenes, Augite, Biotite and Olivine) and one or more foids
  • Phonolite - an overview | ScienceDirect Topics
    Phonolite is defined as a subvolcanic rock characterized by variable pyroxene contents, displaying porphyritic textures with phenocrysts primarily of sanidine and nepheline, and a groundmass predominantly composed of nepheline and sanidine microlites
  • What is Phonolite Rock? – Ova
    Phonolite is a distinctive type of extrusive igneous rock, meaning it forms from volcanic lava that solidifies on or near the Earth's surface It is particularly notable for being rich in specific minerals like nepheline and potash feldspar This fine-grained, compact rock gets its name because it has a unique property: when struck, it often produces a clear, ringing sound, much like a bell
  • Phonolite - newtonsdisciple. com
    Phonolite is unusual in that it forms from a highly silica undersaturated melt by low degrees of partial melting (less than 10%) of highly aluminous lower crustal rocks such as tonalite, monzonite and metamorphic rocks





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