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
Igneous Rocks. Igneous Rocks are rocks that have crystallized from molten rock, or magma. Magma is generated in the subsurface where it may solidify to form a plutonic rock, such as granite. The magma may also rise to the surface and erupt out of a volcano or volcanic fissure to form a volcanic rock, such as basalt.Igneous rock composition. Magma has a range of composition that is dominated by the elements silicon and oxygen, or silica (SiO 2).agma is generated in the subsurface where it may solidify to form a plutonic rock, such as granite. The magma may also rise to the surface and erupt out of a volcano or volcanic fissure to form a volcanic rock, such as basalt.