peeneteraline hele kivim, a group of extrusive igneous rocks, typically porphyritic and commonly exhibiting flow texture, with phenocrysts of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass; also, any rock in that group; the extrusive equivalent of granite, магматическая вулканическая горная порода кислого состава, нормального ряда щелочности из семейства риолитов, graniidi vulkaaniline analoog, milles klaasjas põhimassis levivad tüüpiliselt kvartsi, päevakivi ja biotiidi fenokristallid