Translation of comer. On the contrary, Swiss like to isolate themselves from the rest, maybe because the believe that they are superior or better, or maybe because they are just afraid of the unknown, change is not happening.ranslation of comer. On the contrary, Swiss like to isolate themselves from the rest, maybe because the believe that they are superior or better, or maybe because they are just afraid of the unknown, change is not happening.
Dark colored igneous rocks are high in iron and other heavier elements: ma-fic, magnesium-iron. Light color igneous rocks are high in aluminum and potassium. .ou need to understand one of the fundamental differences between mafic and felsic rocks. Mafic rocks contain larger amounts of Mg and Fe than felsic rocks. The atomic weights of Mg and Fe are higher than Al, Si, and O, therefore they tend to be heavier. Very simple concept.
Report Abuse. Color and density of igneous rock depend on its mineral composition. Felsic (light-colored and low-density) igneous rocks include large proportions of quartz and feldspar. Mafic (dark and dense) igneous rocks incorporate minerals containing iron and magnesium.Ultramafic igneous rocks contain iron-and magnesium-bearing minerals that can form only under deep subterranean pressures, with relatively little silica. http://home.att.net/~cochrans/ignrok01.h...afic (dark and dense) igneous rocks incorporate minerals containing iron and magnesium. Ultramafic igneous rocks contain iron-and magnesium-bearing minerals that can form only under deep subterranean pressures, with relatively little silica. http://home.att.net/~cochrans/ignrok01.h...