- groundnut oil,
Origin of groundmass
Examples from the Web for groundmass
Pyroxene, quartz and augite form the groundmass, as seen in section.The Long Labrador Trail|Dillon Wallace
These lavas have groundmass textures that vary from almost holo-crystalline to glassy.
In a basal flow in Moraine Park, the slaggy and compact phases show differences in phenocrysts as well as in groundmass.