The study of speech sounds in language or a language with reference to their distribution and patterning and to tacit rules governing pronunciation. 2. The sound system of a language: the phonology of English. phoÂ·noÂ·logâ²ic (fÅâ²nÉ-lÅjâ²Ä­k) , phoâ²noÂ·logâ²iÂ·cal (-Ä­-kÉl) adj.
What does a porphyritic texture indicate about the history of an igneous rock? the magma sat and cooled a bit below the Earth's surface, thus giving time for the large crystals to grow, before erupting onto the surface and cooling very quickly
8. What does a porphyritic texture indicate about igneous rock? Two, distinctively different sizes of mineral grains in the same igneous rock (a porphyritic texture) usually mean that grain growth occurred in two stages. First, the larger grains (phenocrysts) grew over a prolonged period of crystallization at a slow cooling rate in a magma chamber deep below the surface.