Yahoo Web Search

  1. About 7 search results
  1. › wiki › GabbroGabbro - Wikipedia

    Gabbro is a coarse-grained igneous rock that is relatively low in silica and rich in iron, magnesium, and calcium.Such rock is described as mafic.Gabbro is composed of pyroxene and calcium-rich plagioclase, with minor amounts of hornblende, olivine, and accessory minerals.

  2. › wiki › ForsteriteForsterite - Wikipedia

    Pure forsterite is composed of magnesium, oxygen and silicon. The chemical formula is Mg 2 SiO 4.Forsterite, fayalite (Fe 2 SiO 4) and tephroite (Mn 2 SiO 4) are the end-members of the olivine solid solution series; other elements such as Ni and Ca substitute for Fe and Mg in olivine, but only in minor proportions in natural occurrences.

  1. People also search for