felspar
131syenite — /ˈsaɪənaɪt/ (say suyuhnuyt) noun a granular igneous rock consisting typically of felspar (orthoclase) and hornblende. {Latin Syēnītēs(lapis) (stone) of Syene, former name of Aswan, a city in SE Egypt} –syenitic /saɪəˈnɪtɪk/ (say suyuh nitik),… …
132trachyte — /ˈtreɪkaɪt/ (say traykuyt), /ˈtræk / (say trak ) noun a volcanic rock, commonly of porphyritic texture, consisting essentially of alkali felspar and one or more subordinate minerals, as hornblende, mica, etc. {French, from Greek trāchytēs… …
