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.
Olivine is a common mineral in dark-colored igneous rocks because these rocks are rich in iron and magnesium (rocks rich in iron-bearing minerals tend to be either black or at least dark-colored).t implies relatively low content of silicon which is indeed the case. Olivine is a silicate mineral that uses silicon very conservatively. On the other end of the spectrum is mineral quartz which is pure silica (SiO 2) without any other constituents.