groundmass การใช้

• Spinels in the groundmass suggest that crustal contamination was extensive.
• Because their groundmass is generally amorphous in structure, fulgurites are classified as mineraloids.
• The alkali feldspar is confined to the groundmass.
• The phlogopites are the glittering minerals surrounded by the green groundmass of olivine . ]]
• Near the groundmass, which indicates the mounds may have been formed of till originally.
• The dacites contain phenocrysts of biotite and large feldspar crystals embedded in an oxidized groundmass.
• "Clavulinopsis " has an free aggulinated test with a considerable calcareous groundmass.
• The groundmass contains plagioclase, pyroxene, silicon dioxide and oxides of iron and titanium.
• Resorbed olivine macrocrysts and euhedral primary crystals of groundmass olivine are common but not essential constituents.
• The primary crystallized and fast crystallized calcites form phenocrysts and fine-grained groundmass, respectively.
• The groundmass comprises 80-85 % plagioclase feldspar, with lesser quartz, biotite and magnetite.
• In many trachytes, however, the phenocrysts are few and small, and the groundmass comparatively coarse.
• Aphanites are commonly porphyritic, having large crystals embedded in the fine groundmass or inclusions are called phenocrysts.
• Andesine-labradorite plagioclase and pyroxene phenocrysts are found in the lavas, which has a fine grained groundmass.
• Groundmass of rock is the fine-grained mass of material in which larger grains or crystals are embedded.
• Phenocrysts below this level, but still larger than the groundmass crystals, are termed " microphenocrysts ".
• It can be found in high-grade metamorphic rocks, xenoliths and in the groundmass of rhyolite and dacite.
• The NAKP volcanics, including the ML pipes, contain abundant lapilli and olivine supported in a fine-grained groundmass.
• The centre of a lava flow is commonly massive and crystalline, flow banded or layered, with microscopic groundmass crystals.
• Acting Detective Inspector Alan Fitzgerald said both Virgin Atlantic and the Initial Aviation Security group had supported the investigation, codenamed Operation Groundmass.