groundmass Definition

aphanitic, cryptocrystalline, felsitic, holocrystalline, microlitic, augitic, tephrite, nephelinite, angrite, feldspathoid, miascite, aphanite, ditroite, phaneritic, liparite, smaragdite, felstone, plagioclase, xenocryst, omphacite, melaphyre, feldspar, saussurite, porphyrite, basanite, igneous rock, igneous, euphotide, pegmatite, hornblende, pyroxene, biotite, porphyry, phenocryst, andesite, diabase, syenite, sanidine, septarium, stilpnomelane, variolite, metamorphic rock, trachyte, psammite, tholeiite, rhyolite, gabbro, nevadite, amphibole group, peridotite, felsic, eurite, eucrite, stinkstone, ureilite, clast, lepidomelane, nepheline, diorite, viridite, mussite, trachytoid, hypersthene, sedimentary rock, knebelite, monzonite, volcanic rock, dacite, schist, babingtonite, anorthosite, arenite, olivine, micropegmatite, amphibolite, epidote, microcline, martite, mafic, gneiss, leucitoid, pyroxenite, siltstone, perthite, clastic rock, granodiorite, kerolite, ultramafic, belonite, troilite, orthoclase, cyclosilicate, pigeonite, tyrolite, pargasite, meionite, ampelite, peperino, aplite, novaculite,