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.