groundmass

How To Use groundmass In A Sentence

• In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite.
• Quartz in groundmass does not appear to have nucleated directly on phenocryst, but is in optical continuity with it. (f) Primary vapor-rich fluid inclusion in phenocrystic quartz. Granophyre_photos.html
• The groundmass of these leucocratic segregations is heterogeneous, consisting of centimeter-scale regions dominated by nepheline, natrolite, alkali feldspar, or wollastonite.
• The maximum length of most microbes in Group II could not be measured accurately because they are tightly embedded in the silica groundmass.
• The groundmass consists mainly of bytownite with large grains of diopside and of colourless olivine, and small octahedrons of magnetite.
• The rock here is a porphyritic granite (porhyritic meaning that the stone has large-grained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic matrix or groundmass). Of Books and the Sea
• The granite's granophyric groundmass consists of intergrown quartz and potassium feldspar (~Or45), the latter consisting of plumose splays that nucleated directly from pre-existing phenocrysts. Granophyre.html
• The groundmass of these leucocratic segregations is heterogeneous, consisting of centimeter-scale regions dominated by nepheline, natrolite, alkali feldspar, or wollastonite.
• Pyroxene, quartz and augite form the groundmass, as seen in section. The Long Labrador Trail
• Mineral and groundmass separates were loaded in 99.99% copper foil packets.