GEOL 1001 Chapter : 21-Jan
Document Summary
3 components liquid portion = melt solids (crystals of silicate min) volatiles are dissolved gases in the melt that vaporise at surface pressure most common volatiles in magma. Lesser amounts produced: what are divergent margins, is a linear feature that exists between two tectonic plates that are moving away from each other. Divergent boundaries within continents initially produce rifts which eventually become rift valleys. Most active divergent plate boundaries occur betweenoceanic plates and exist as mid-oceanic ridges. Must lava of a single volcano retain a constant composition? nahhhh son. Minerals crystalise in a systematic fashion based on their melting points. As minerals crystalise, the composition of the liquid portion of the magma continually changes. Ultramafic mafic intermediate felsic: explain which minerals would crystalise first in magma chamber, highest melting points, which min set crystallises in continuously varying comp, some series.
