porphyritic rock การใช้

• Porphyritic rocks are formed when a column of rising magma is cooled in two stages.
• He studied chemistry at the University of Giessen as a pupil of Justus von Liebig, then continued his education at porphyritic rocks.
• There are several different theories for its origin but one of the more popular theories is that it was created by porphyritic rock with elements of quartz and red feldspar.
• Oroscocha is formed by phenocryst-rich, felsic porphyritic rocks with a composition of peraluminous rhyolite in the flows and trachydacite in the dome, of which the dome is darker than the lava flows.
• Iddingsite forms from the weathering of basalt in the presence of liquid water and can be described as a phenocryst, i . e . it has megascopically visible crystals in a fine-grained groundmass of a porphyritic rock.